Tin is a chemical element with the symbol Sn (from Latin: stannum) and atomic number 50. It is a post-transition metal in group 14 of the periodic table of elements. It is obtained chiefly from the mineral cassiterite, which contains stannic oxide, SnO2. Tin shows a chemical similarity to both of its neighbors in group 14, germanium and lead, and has two main oxidation states, +2 and the slightly more stable +4. Tin is the 49th most abundant element and has, with 10 stable isotopes, the largest number of stable isotopes in the periodic table, thanks to its magic number of protons. It has two main allotropes: at room temperature, the stable allotrope is β-tin, a silvery-white, malleable metal, but at low temperatures it transforms into the less dense grey α-tin, which has the diamond cubic structure. Metallic tin does not easily oxidize in air.
The first tin alloy used on a large scale was bronze, made of 1/8 tin and 7/8 copper, from as early as 3000 BC. After 600 BC, pure metallic tin was produced. Pewter, which is an alloy of 85–90% tin with the remainder commonly consisting of copper, antimony, and lead, was used for flatware from the Bronze Age until the 20th century. In modern times, tin is used in many alloys, most notably tin/lead soft solders, which are typically 60% or more tin and in the manufacture of transparent, electrically conducting films of indium tin oxide in optoelectronic applications. Another large application for tin is corrosion-resistant tin plating of steel. Because of the low toxicity of inorganic tin, tin-plated steel is widely used for food packaging as tin cans. However, some organotin compounds can be almost as toxic as cyanide.
|Allotropes||alpha, α (gray); beta, β (white)|
|Appearance||silvery-white (beta, β) or gray (alpha, α)|
|Standard atomic weight (Ar, standard)||118.710(7)|
|Tin in the periodic table|
|Atomic number (Z)||50|
|Group||group 14 (carbon group)|
|Element category||post-transition metal|
|Electron configuration||[Kr] 4d10 5s2 5p2|
Electrons per shell
|2, 8, 18, 18, 4|
|Phase at STP||solid|
|Melting point||505.08 K (231.93 °C, 449.47 °F)|
|Boiling point||2875 K (2602 °C, 4716 °F)|
|Density (near r.t.)||white, β: 7.265 g/cm3 |
gray, α: 5.769 g/cm3
|when liquid (at m.p.)||6.99 g/cm3|
|Heat of fusion||white, β: 7.03 kJ/mol|
|Heat of vaporization||white, β: 296.1 kJ/mol|
|Molar heat capacity||white, β: 27.112 J/(mol·K)|
|Oxidation states||−4, −3, −2, −1, +1, +2, +3, +4 (an amphoteric oxide)|
|Electronegativity||Pauling scale: 1.96|
|Atomic radius||empirical: 140 pm|
|Covalent radius||139±4 pm|
|Van der Waals radius||217 pm|
Spectral lines of tin
|Crystal structure|| tetragonal|
|Crystal structure|| face-centered diamond-cubic|
|Speed of sound thin rod||2730 m/s (at r.t.) (rolled)|
|Thermal expansion||22.0 µm/(m·K) (at 25 °C)|
|Thermal conductivity||66.8 W/(m·K)|
|Electrical resistivity||115 nΩ·m (at 0 °C)|
|Magnetic ordering||gray: diamagnetic|
white (β): paramagnetic
|Magnetic susceptibility||(white) +3.1·10−6 cm3/mol (298 K)|
|Young's modulus||50 GPa|
|Shear modulus||18 GPa|
|Bulk modulus||58 GPa|
|Brinell hardness||50–440 MPa|
|Discovery||around 3500 BC|
|Main isotopes of tin|
Tin is a soft, malleable, ductile and highly crystalline silvery-white metal. When a bar of tin is bent, a crackling sound known as the "tin cry" can be heard from the twinning of the crystals. Tin melts at low temperatures of about 232 °C (450 °F), the lowest in group 14. The melting point is further lowered to 177.3 °C (351.1 °F) for 11 nm particles.
|β–α transition of tin at −40 °C (time lapse; one second of the video is one hour in real time|
β-tin (the metallic form, or white tin, BCT structure), which is stable at and above room temperature, is malleable. In contrast, α-tin (nonmetallic form, or gray tin), which is stable below 13.2 °C (55.8 °F), is brittle. α-tin has a diamond cubic crystal structure, similar to diamond, silicon or germanium. α-tin has no metallic properties at all because its atoms form a covalent structure in which electrons cannot move freely. It is a dull-gray powdery material with no common uses other than a few specialized semiconductor applications. These two allotropes, α-tin and β-tin, are more commonly known as gray tin and white tin, respectively. Two more allotropes, γ and σ, exist at temperatures above 161 °C (322 °F) and pressures above several GPa. In cold conditions, β-tin tends to transform spontaneously into α-tin, a phenomenon known as "tin pest". Although the α-β transformation temperature is nominally 13.2 °C (55.8 °F), impurities (e.g. Al, Zn, etc.) lower the transition temperature well below 0 °C (32 °F) and, on the addition of antimony or bismuth, the transformation might not occur at all, increasing the durability of the tin.
Commercial grades of tin (99.8%) resist transformation because of the inhibiting effect of the small amounts of bismuth, antimony, lead, and silver present as impurities. Alloying elements such as copper, antimony, bismuth, cadmium, and silver increase its hardness. Tin tends rather easily to form hard, brittle intermetallic phases, which are often undesirable. It does not form wide solid solution ranges in other metals in general, and few elements have appreciable solid solubility in tin. Simple eutectic systems, however, occur with bismuth, gallium, lead, thallium and zinc.
Tin becomes a superconductor below 3.72 K and was one of the first superconductors to be studied; the Meissner effect, one of the characteristic features of superconductors, was first discovered in superconducting tin crystals.
Tin resists corrosion from water, but can be attacked by acids and alkalis. Tin can be highly polished and is used as a protective coat for other metals. A protective oxide (passivation) layer prevents further oxidation, the same that forms on pewter and other tin alloys. Tin acts as a catalyst when oxygen is in solution and helps to accelerate the chemical reaction.
Tin has ten stable isotopes, with atomic masses of 112, 114 through 120, 122 and 124, the greatest number of any element. Of these, the most abundant are 120Sn (almost a third of all tin), 118Sn, and 116Sn, while the least abundant is 115Sn. The isotopes with even mass numbers have no nuclear spin, while those with odd have a spin of +1/2. Tin, with its three common isotopes 116Sn, 118Sn and 120Sn, is among the easiest elements to detect and analyze by NMR spectroscopy, and its chemical shifts are referenced against SnMe
This large number of stable isotopes is thought to be a direct result of the atomic number 50, a "magic number" in nuclear physics. Tin also occurs in 29 unstable isotopes, encompassing all the remaining atomic masses from 99 to 137. Apart from 126Sn, with a half-life of 230,000 years, all the radioisotopes have a half-life of less than a year. The radioactive 100Sn, discovered in 1994, and 132Sn are one of the few nuclides with a "doubly magic" nucleus: despite being unstable, having very lopsided proton–neutron ratios, they represent endpoints beyond which stability drops off rapidly. Another 30 metastable isomers have been characterized for isotopes between 111 and 131, the most stable being 121mSn with a half-life of 43.9 years.
The relative differences in the abundances of tin's stable isotopes can be explained by their different modes of formation in stellar nucleosynthesis. 116Sn through 120Sn inclusive are formed in the s-process (slow neutron capture) in most stars and hence they are the most common isotopes, while 122Sn and 124Sn are only formed in the r-process (rapid neutron capture) in supernovae and are less common. (The isotopes 117Sn through 120Sn also receive contributions from the r-process.) Finally, the rarest proton-rich isotopes, 112Sn, 114Sn, and 115Sn, cannot be made in significant amounts in the s- or r-processes and are considered among the p-nuclei, whose origins are not well understood yet. Some speculated mechanisms for their formation include proton capture as well as photodisintegration, although 115Sn might also be partially produced in the s-process, both directly, and as the daughter of long-lived 115In.
The word tin is shared among Germanic languages and can be traced back to reconstructed Proto-Germanic *tin-om; cognates include German Zinn, Swedish tenn and Dutch tin. It is not found in other branches of Indo-European, except by borrowing from Germanic (e.g., Irish tinne from English).
The Latin name stannum originally meant an alloy of silver and lead, and came to mean 'tin' in the 4th century—the earlier Latin word for it was plumbum candidum, or "white lead". Stannum apparently came from an earlier stāgnum (meaning the same substance), the origin of the Romance and Celtic terms for tin. The origin of stannum/stāgnum is unknown; it may be pre-Indo-European.
The Meyers Konversations-Lexikon speculates on the contrary that stannum is derived from (the ancestor of) Cornish stean, and is proof that Cornwall in the first centuries AD was the main source of tin.
Tin extraction and use can be dated to the beginnings of the Bronze Age around 3000 BC, when it was observed that copper objects formed of polymetallic ores with different metal contents had different physical properties. The earliest bronze objects had a tin or arsenic content of less than 2% and are therefore believed to be the result of unintentional alloying due to trace metal content in the copper ore. The addition of a second metal to copper increases its hardness, lowers the melting temperature, and improves the casting process by producing a more fluid melt that cools to a denser, less spongy metal. This was an important innovation that allowed for the much more complex shapes cast in closed moulds of the Bronze Age. Arsenical bronze objects appear first in the Near East where arsenic is commonly found in association with copper ore, but the health risks were quickly realized and the quest for sources of the much less hazardous tin ores began early in the Bronze Age. This created the demand for rare tin metal and formed a trade network that linked the distant sources of tin to the markets of Bronze Age cultures.
Cassiterite (SnO2), the tin oxide form of tin, was most likely the original source of tin in ancient times. Other forms of tin ores are less abundant sulfides such as stannite that require a more involved smelting process. Cassiterite often accumulates in alluvial channels as placer deposits because it is harder, heavier, and more chemically resistant than the accompanying granite. Cassiterite is usually black or generally dark in color, and these deposits can be easily seen in river banks. Alluvial (placer) deposits could be easily collected and separated by methods similar to gold panning.
In the great majority of its compounds, tin has the oxidation state II or IV.
Halide compounds are known for both oxidation states. For Sn(IV), all four halides are well known: SnF4, SnCl4, SnBr4, and SnI4. The three heavier members are volatile molecular compounds, whereas the tetrafluoride is polymeric. All four halides are known for Sn(II) also: SnF2, SnCl2, SnBr2, and SnI2. All are polymeric solids. Of these eight compounds, only the iodides are colored.
Tin(II) chloride (also known as stannous chloride) is the most important tin halide in a commercial sense. Illustrating the routes to such compounds, chlorine reacts with tin metal to give SnCl4 whereas the reaction of hydrochloric acid and tin produces SnCl2 and hydrogen gas. Alternatively SnCl4 and Sn combine to stannous chloride by a process called comproportionation:
Tin can form many oxides, sulfides, and other chalcogenide derivatives. The dioxide SnO2 (cassiterite) forms when tin is heated in the presence of air. SnO2 is amphoteric, which means that it dissolves in both acidic and basic solutions. Stannates with the structure [Sn(OH)6]2−, like K2[Sn(OH)6], are also known, though the free stannic acid H2[Sn(OH)6] is unknown.
Stannane (SnH4), with tin in the +4 oxidation state, is unstable. Organotin hydrides are however well known, e.g. tributyltin hydride (Sn(C4H9)3H). These compound release transient tributyl tin radicals, which are rare examples of compounds of tin(III).
Organotin compounds, sometimes called stannanes, are chemical compounds with tin–carbon bonds. Of the compounds of tin, the organic derivatives are the most useful commercially. Some organotin compounds are highly toxic and have been used as biocides. The first organotin compound to be reported was diethyltin diiodide ((C2H5)2SnI2), reported by Edward Frankland in 1849.
Most organotin compounds are colorless liquids or solids that are stable to air and water. They adopt tetrahedral geometry. Tetraalkyl- and tetraaryltin compounds can be prepared using Grignard reagents:
The mixed halide-alkyls, which are more common and more important commercially than the tetraorgano derivatives, are prepared by redistribution reactions:
Divalent organotin compounds are uncommon, although more common than related divalent organogermanium and organosilicon compounds. The greater stabilization enjoyed by Sn(II) is attributed to the "inert pair effect". Organotin(II) compounds include both stannylenes (formula: R2Sn, as seen for singlet carbenes) and distannylenes (R4Sn2), which are roughly equivalent to alkenes. Both classes exhibit unusual reactions.
Tin does not occur as the native element but must be extracted from various ores. Cassiterite (SnO2) is the only commercially important source of tin, although small quantities of tin are recovered from complex sulfides such as stannite, cylindrite, franckeite, canfieldite, and teallite. Minerals with tin are almost always associated with granite rock, usually at a level of 1% tin oxide content.
Because of the higher specific gravity of tin dioxide, about 80% of mined tin is from secondary deposits found downstream from the primary lodes. Tin is often recovered from granules washed downstream in the past and deposited in valleys or the sea. The most economical ways of mining tin are by dredging, hydraulicking, or open pits. Most of the world's tin is produced from placer deposits, which can contain as little as 0.015% tin.
About 253,000 tonnes of tin have been mined in 2011, mostly in China (110,000 t), Indonesia (51,000 t), Peru (34,600 t), Bolivia (20,700 t) and Brazil (12,000 t). Estimates of tin production have historically varied with the dynamics of economic feasibility and the development of mining technologies, but it is estimated that, at current consumption rates and technologies, the Earth will run out of mine-able tin in 40 years. Lester Brown has suggested tin could run out within 20 years based on an extremely conservative extrapolation of 2% growth per year.
Secondary, or scrap, tin is also an important source of the metal. Recovery of tin through secondary production, or recycling of scrap tin, is increasing rapidly. Whereas the United States has neither mined since 1993 nor smelted tin since 1989, it was the largest secondary producer, recycling nearly 14,000 tonnes in 2006.
The ten largest companies produced most of the world's tin in 2007.
|Malaysia Smelting Corp||Malaysia||22,850||25,471||11.5|
|Liuzhou China Tin||China||13,499||13,193||−2.3|
|Gold Bell Group||China||4,696||8,000||70.9|
An International Tin Council was established in 1947 to control the price of tin, until it collapsed in 1985. In 1984, an Association of Tin Producing Countries was created, with Australia, Bolivia, Indonesia, Malaysia, Nigeria, Thailand, and Zaire as members.
Tin is unique among other mineral commodities because of the complex agreements between producer countries and consumer countries dating back to 1921. The earlier agreements tended to be somewhat informal and sporadic and led to the "First International Tin Agreement" in 1956, the first of a continuously numbered series that effectively collapsed in 1985. Through this series of agreements, the International Tin Council (ITC) had a considerable effect on tin prices. The ITC supported the price of tin during periods of low prices by buying tin for its buffer stockpile and was able to restrain the price during periods of high prices by selling tin from the stockpile. This was an anti-free-market approach, designed to assure a sufficient flow of tin to consumer countries and a profit for producer countries. However, the buffer stockpile was not sufficiently large, and during most of those 29 years tin prices rose, sometimes sharply, especially from 1973 through 1980 when rampant inflation plagued many world economies.
During the late 1970s and early 1980s, the U.S. Government tin stockpile was in an aggressive selling mode, partly to take advantage of the historically high tin prices. The sharp recession of 1981–82 proved to be quite harsh on the tin industry. Tin consumption declined dramatically. The ITC was able to avoid truly steep declines through accelerated buying for its buffer stockpile; this activity required the ITC to borrow extensively from banks and metal trading firms to augment its resources. The ITC continued to borrow until late 1985 when it reached its credit limit. Immediately, a major "tin crisis" followed — tin was delisted from trading on the London Metal Exchange for about three years, the ITC dissolved soon afterward, and the price of tin, now in a free-market environment, plummeted sharply to $4 per pound and remained at that level through the 1990s. The price increased again by 2010 with a rebound in consumption following the 2008–09 world economic crisis, accompanying restocking and continued growth in consumption by the world's developing economies.
The price per kg over years:
In 2006, about half of all tin produced was used in solder. The rest was divided between tin plating, tin chemicals, brass and bronze alloys, and niche uses.
Tin has long been used in alloys with lead as solder, in amounts 5 to 70% w/w. Tin with lead forms a eutectic mixture at the weight proportion of 61.9% tin and 38.1% lead (the atomic proportion: 73.9% tin and 26.1% lead), with melting temperature of 183 °C (361.4 °F) . Such solders are primarily used for joining pipes or electric circuits. Since the European Union Waste Electrical and Electronic Equipment Directive (WEEE Directive) and Restriction of Hazardous Substances Directive came into effect on 1 July 2006, the lead content in such alloys has decreased. Replacing lead has many problems, including a higher melting point, and the formation of tin whiskers causing electrical problems. Tin pest can occur in lead-free solders, leading to loss of the soldered joint. Replacement alloys are rapidly being found, although problems of joint integrity remain.
Tin bonds readily to iron and is used for coating lead, zinc and steel to prevent corrosion. Tin-plated steel containers are widely used for food preservation, and this forms a large part of the market for metallic tin. A tinplate canister for preserving food was first manufactured in London in 1812. Speakers of British English call them "tins", while speakers of American English call them "cans" or "tin cans". One derivation of such use is the slang term "tinnie" or "tinny", meaning "can of beer" in Australia. The tin whistle is so called because it was first mass-produced in tin-plated steel. Copper cooking vessels such as saucepans and frying pans are frequently lined with a thin plating of tin, since the combination of acid foods with copper can be toxic.
Tin in combination with other elements forms a wide variety of useful alloys. Tin is most commonly alloyed with copper. Pewter is 85–99% tin; bearing metal has a high percentage of tin as well. Bronze is mostly copper (12% tin), while addition of phosphorus gives phosphor bronze. Bell metal is also a copper–tin alloy, containing 22% tin. Tin has sometimes been used in coinage; for example, it once formed a single-digit percentage (usually five percent or less) of American and Canadian pennies. Because copper is often the major metal in such coins, sometimes including zinc, these could be called bronze and/or brass alloys.
The niobium–tin compound Nb3Sn is commercially used in coils of superconducting magnets for its high critical temperature (18 K) and critical magnetic field (25 T). A superconducting magnet weighing as little as two kilograms is capable of the magnetic field of a conventional electromagnet weighing tons.
Most metal pipes in a pipe organ are of a tin/lead alloy, with 50/50 being the most common composition. The proportion of tin in the pipe defines the pipe's tone, since tin has a desirable tonal resonance. When a tin/lead alloy cools, the lead cools slightly faster and produces a mottled or spotted effect. This metal alloy is referred to as spotted metal. Major advantages of using tin for pipes include its appearance, its workability, and resistance to corrosion.
The oxides of indium and tin are electrically conductive and transparent, and are used to make transparent electrically conducting films with applications in Optoelectronics devices such as liquid crystal displays.
Punched tin-plated steel, also called pierced tin, is an artisan technique originating in central Europe for creating housewares that are both functional and decorative. Decorative piercing designs exist in a wide variety, based on local tradition and the artisan's personal creations. Punched tin lanterns are the most common application of this artisan technique. The light of a candle shining through the pierced design creates a decorative light pattern in the room where it sits. Lanterns and other punched tin articles were created in the New World from the earliest European settlement. A well-known example is the Revere lantern, named after Paul Revere.
Before the modern era, in some areas of the Alps, a goat or sheep's horn would be sharpened and a tin panel would be punched out using the alphabet and numbers from one to nine. This learning tool was known appropriately as "the horn". Modern reproductions are decorated with such motifs as hearts and tulips.
In America, pie safes and food safes were in use in the days before refrigeration. These were wooden cupboards of various styles and sizes – either floor standing or hanging cupboards meant to discourage vermin and insects and to keep dust from perishable foodstuffs. These cabinets had tinplate inserts in the doors and sometimes in the sides, punched out by the homeowner, cabinetmaker or a tinsmith in varying designs to allow for air circulation while excluding flies. Modern reproductions of these articles remain popular in North America.
Tin is also used as a negative electrode in advanced Li-ion batteries. Its application is somewhat limited by the fact that some tin surfaces catalyze decomposition of carbonate-based electrolytes used in Li-ion batteries.
Tin(II) fluoride is added to some dental care products as stannous fluoride (SnF2). Tin(II) fluoride can be mixed with calcium abrasives while the more common sodium fluoride gradually becomes biologically inactive in the presence of calcium compounds. It has also been shown to be more effective than sodium fluoride in controlling gingivitis.
The major commercial application of organotin compounds is in the stabilization of PVC plastics. In the absence of such stabilizers, PVC would otherwise rapidly degrade under heat, light, and atmospheric oxygen, resulting in discolored, brittle products. Tin scavenges labile chloride ions (Cl−), which would otherwise initiate loss of HCl from the plastic material. Typical tin compounds are carboxylic acid derivatives of dibutyltin dichloride, such as the dilaurate.
Some organotin compounds are relatively toxic, with both advantages and problems. They are used for biocidal properties as fungicides, pesticides, algaecides, wood preservatives, and antifouling agents. Tributyltin oxide is used as a wood preservative. Tributyltin was used as additive for ship paint to prevent growth of marine organisms on ships, with use declining after organotin compounds were recognized as persistent organic pollutants with an extremely high toxicity for some marine organisms (the dog whelk, for example). The EU banned the use of organotin compounds in 2003, while concerns over the toxicity of these compounds to marine life and damage to the reproduction and growth of some marine species (some reports describe biological effects to marine life at a concentration of 1 nanogram per liter) have led to a worldwide ban by the International Maritime Organization. Many nations now restrict the use of organotin compounds to vessels greater than 25 m (82 ft) long.
Some tin reagents are useful in organic chemistry. In the largest application, stannous chloride is a common reducing agent for the conversion of nitro and oxime groups to amines. The Stille reaction couples organotin compounds with organic halides or pseudohalides.
Tin forms several inter-metallic phases with lithium metal, making it a potentially attractive material for battery applications. Large volumetric expansion of tin upon alloying with lithium and instability of the tin-organic electrolyte interface at low electrochemical potentials are the greatest challenges to employment in commercial cells. The problem was partially solved by Sony. Tin inter-metallic compound with cobalt and carbon has been implemented by Sony in its Nexelion cells released in the late 2000s. The composition of the active material is approximately Sn0.3Co0.4C0.3. Recent research showed that only some crystalline facets of tetragonal (beta) Sn are responsible for undesirable electrochemical activity.
Exposure to tin in the workplace can occur by inhalation, skin contact, and eye contact. The Occupational Safety and Health Administration (OSHA) has set the legal limit (permissible exposure limit) for tin exposure in the workplace as 2 mg/m3 over an 8-hour workday. The National Institute for Occupational Safety and Health (NIOSH) has determined a recommended exposure limit (REL) of 2 mg/m3 over an 8-hour workday. At levels of 100 mg/m3, tin is immediately dangerous to life and health.
Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (such as aluminium, manganese, nickel or zinc) and sometimes non-metals or metalloids such as arsenic, phosphorus or silicon. These additions produce a range of alloys that may be harder than copper alone, or have other useful properties, such as stiffness, ductility, or machinability.
The archeological period in which bronze was the hardest metal in widespread use is known as the Bronze Age. The beginning of the Bronze Age in India and western Eurasia is conventionally dated to the mid-4th millennium BC, and to the early 2nd millennium BC in China; everywhere it gradually spread across regions. The Bronze Age was followed by the Iron Age starting from about 1300 BC and reaching most of Eurasia by about 500 BC, although bronze continued to be much more widely used than it is in modern times.
Because historical pieces were often made of brasses (copper and zinc) and bronzes with different compositions, modern museum and scholarly descriptions of older objects increasingly use the more inclusive term "copper alloy" instead.Bronze Age
The Bronze Age is a historical period characterized by the use of bronze, and in some areas proto-writing, and other early features of urban civilization. The Bronze Age is the second principal period of the three-age Stone-Bronze-Iron system, as proposed in modern times by Christian Jürgensen Thomsen, for classifying and studying ancient societies.
An ancient civilization is defined to be in the Bronze Age either by producing bronze by smelting its own copper and alloying with tin, arsenic, or other metals, or by trading for bronze from production areas elsewhere. Bronze itself is harder and more durable than other metals available at the time, allowing Bronze Age civilizations to gain a technological advantage.
Copper-tin ores are rare, as reflected in the fact that there were no tin bronzes in Western Asia before trading in bronze began in the third millennium BC. Worldwide, the Bronze Age generally followed the Neolithic period, with the Chalcolithic serving as a transition. Although the Iron Age generally followed the Bronze Age, in some areas (such as Sub-Saharan Africa), the Iron Age intruded directly on the Neolithic.Bronze Age cultures differed in their development of the first writing. According to archaeological evidence, cultures in Mesopotamia (cuneiform script) and Egypt (hieroglyphs) developed the earliest viable writing systems.Carbon group
The carbon group is a periodic table group consisting of carbon (C), silicon (Si), germanium (Ge), tin (Sn), lead (Pb), and flerovium (Fl).
In modern IUPAC notation, it is called Group 14. In the field of semiconductor physics, it is still universally called Group IV. The group was once also known as the tetrels (from the Greek word tetra, which means four), stemming from the Roman numeral IV in the group names, or (not coincidentally) from the fact that these elements have four valence electrons (see below).Cat on a Hot Tin Roof
Cat on a Hot Tin Roof is a play by Tennessee Williams. One of Williams's more famous works and his personal favorite, the play won the Pulitzer Prize for Drama in 1955. Set in the "plantation home in the Mississippi Delta" of Big Daddy Pollitt, a wealthy cotton tycoon, the play examines the relationships among members of Big Daddy's family, primarily between his son Brick and Maggie the "Cat", Brick's wife.
Cat on a Hot Tin Roof features motifs such as social mores, greed, superficiality, mendacity, decay, sexual desire, repression and death. Dialogue throughout is often rendered phonetically to represent accents of the Southern United States. The original production starred Barbara Bel Geddes, Burl Ives and Ben Gazzara. The play was adapted as a motion picture of the same name in 1958, starring Elizabeth Taylor and Paul Newman as Maggie and Brick, with Burl Ives and Madeleine Sherwood recreating their stage roles. Williams made substantial excisions and alterations to the play for a revival in 1974. This has been the version used for most subsequent revivals, which have been numerous.Ford Model T
The Ford Model T (colloquially known as the Tin Lizzie, Leaping Lena, or flivver) is an automobile produced by Ford Motor Company from October 1, 1908, to May 26, 1927. It is generally regarded as the first affordable automobile, the car that opened travel to the common middle-class American; some of this was because of Ford's efficient fabrication, including assembly line production instead of individual hand crafting.The Ford Model T was named the most influential car of the 20th century in the 1999 Car of the Century competition, ahead of the BMC Mini, Citroën DS, and Volkswagen Type 1. Ford's Model T was successful not only because it provided inexpensive transportation on a massive scale, but also because the car signified innovation for the rising middle class and became a powerful symbol of America's age of modernization. With 16.5 million sold it stands eighth on the top ten list of most sold cars of all time as of 2012.Although automobiles had already existed for decades, they were still mostly scarce, expensive, and unreliable at the Model T's introduction in 1908. Positioned as reliable, easily maintained, mass-market transportation, it was a runaway success. In a matter of days after the release, 15,000 orders were placed. The first production Model T was produced on August 12, 1908 and left the factory on September 27, 1908, at the Ford Piquette Avenue Plant in Detroit, Michigan. On May 26, 1927, Henry Ford watched the 15 millionth Model T Ford roll off the assembly line at his factory in Highland Park, Michigan.Henry Ford conceived a series of cars between the founding of the company in 1903 and the introduction the Model T. Ford named his first car the Model A and proceeded through the alphabet up through the Model T, twenty models in all. Not all the models went into production. The production model immediately before the Model T was the Model S, an upgraded version of the company's largest success to that point, the Model N. The follow-up was the Ford Model A (rather than any Model U). The company publicity said this was because the new car was such a departure from the old that Henry wanted to start all over again with the letter A.
The Model T was Ford's first automobile mass-produced on moving assembly lines with completely interchangeable parts, marketed to the middle class. Henry Ford said of the vehicle:
I will build a car for the great multitude. It will be large enough for the family, but small enough for the individual to run and care for. It will be constructed of the best materials, by the best men to be hired, after the simplest designs that modern engineering can devise. But it will be so low in price that no man making a good salary will be unable to own one – and enjoy with his family the blessing of hours of pleasure in God's great open spaces.
Although credit for the development of the assembly line belongs to Ransom E. Olds with the first mass-produced automobile, the Oldsmobile Curved Dash, beginning in 1901, the tremendous advancements in the efficiency of the system over the life of the Model T can be credited almost entirely to the vision of Ford and his engineers.Hymn to Liberty
The "Hymn to Liberty" or "Hymn to Freedom" (Greek: Ύμνος εις την Ελευθερίαν, translit. Ýmnos is tin Eleftherían, pronounced [ˈimnos is tin elefθeˈrian], also Greek: Ύμνος προς την Ελευθερίαν Ýmnos pros tin Eleftherían pronounced [ˈim.nos pros tin elefθe'ri.an]) is a poem written by Dionysios Solomos in 1823 that consists of 158 stanzas, which is used as the national anthem of Greece and Cyprus. It was set to music by Nikolaos Mantzaros, and is the longest national anthem in the world by length of text. In 1865, the first three stanzas (and later the first two) officially became the national anthem of Greece and, from 1966, also that of the Republic of Cyprus.Isotopes of tin
Tin (50Sn) is the element with the greatest number of stable isotopes (ten; three of them are potentially radioactive but have not been observed to decay), which is probably related to the fact that 50 is a "magic number" of protons. 29 additional unstable isotopes are known, including the "doubly magic" tin-100 (100Sn) (discovered in 1994) and tin-132 (132Sn). The longest-lived radioisotope is 126Sn, with a half-life of 230,000 years. The other 28 radioisotopes have half-lives less than a year.Pewter
Pewter () is a malleable metal alloy. It is traditionally composed of 85–99% tin, mixed with copper, antimony, bismuth, and sometimes silver or lead, although the use of lead is less common today. Copper and antimony act as hardeners while lead is more common in the lower grades of pewter, which have a bluish tint. Pewter has a low melting point, around 170–230 °C (338–446 °F), depending on the exact mixture of metals. The word pewter is probably a variation of the word spelter, a term for zinc alloys (originally a colloquial name for zinc).Rin Tin Tin
Rin Tin Tin (often hyphenated as Rin-Tin-Tin; September 1918 – August 10, 1932) was a male German Shepherd that was an international star in motion pictures. He was rescued from a World War I battlefield by an American soldier, Lee Duncan, who nicknamed him "Rinty". Duncan trained Rin Tin Tin and obtained silent film work for the dog. Rin Tin Tin was an immediate box-office success and went on to appear in 27 Hollywood films, gaining worldwide fame. Along with the earlier canine film star Strongheart, Rin Tin Tin was responsible for greatly increasing the popularity of German Shepherd dogs as family pets. The immense profitability of his films contributed to the success of Warner Bros. studios and helped advance the career of Darryl F. Zanuck.
After Rin Tin Tin died in 1932, the name was given to several related German Shepherd dogs featured in fictional stories on film, radio, and television. Rin Tin Tin Jr. appeared in some serialized films, but was not as talented as his father. Rin Tin Tin III, said to be Rin Tin Tin's grandson, but probably only distantly related, helped promote the military use of dogs during World War II. Rin Tin Tin III also appeared in a film with child actor Robert Blake in 1947.
Duncan groomed Rin Tin Tin IV for the 1950s television series The Adventures of Rin Tin Tin, but the dog performed poorly in a screen test and was replaced in the TV show by trainer Frank Barnes's dogs, primarily one named Flame Jr., called JR, with the public led to believe otherwise. Instead of shooting episodes, Rin Tin Tin IV stayed at home in Riverside, California. The TV show Rin Tin Tin was nominated for a PATSY Award in 1958 and in 1959, but did not win.
After Duncan died in 1960, the screen property of Rin Tin Tin passed to TV producer Herbert B. "Bert" Leonard, who worked on further adaptations such as the 1988–1993 Canadian-made TV show Katts and Dog which was called Rin Tin Tin: K-9 Cop in the US and Rintintin Junior in France. After Leonard died in 2006, Leonard's lawyer James Tierney made the 2007 children's film Finding Rin Tin Tin, an American–Bulgarian production based on Duncan's discovery of the dog in France. Meanwhile, a Rin Tin Tin memorabilia collection was being amassed by Texas resident Jannettia Propps Brodsgaard, who had purchased several direct descendant dogs from Duncan beginning with Rinty Tin Tin Brodsgaard in 1957. Brodsgaard bred the dogs to keep the bloodline. Brodsgaard's granddaughter, Daphne Hereford, continued to build on the tradition and bloodline of Rin Tin Tin from 1988 to 2011; she was the first to trademark the name Rin Tin Tin in 1993 (Duncan had never done so) and she bought the domain names rintintin.com and rintintin.net to establish a website. Hereford also opened a short-lived Rin Tin Tin museum in Latexo, Texas. Hereford passed the tradition to her daughter, Dorothy Yanchak, in 2011. The current Rin Tin Tin XII dog owned by Yanchak takes part in public events to represent the Rin Tin Tin legacy.Taxpayer Identification Number
A Taxpayer Identification Number (TIN) is an identifying number used for tax purposes in the United States. It is also known as a Tax Identification Number or Federal Taxpayer Identification Number. A TIN may be assigned by the Social Security Administration or by the Internal Revenue Service (IRS).The Adventures of Tintin
The Adventures of Tintin (French: Les Aventures de Tintin [lez‿avɑ̃tyʁ də tɛ̃tɛ̃]) is a series of 24 comic albums created by Belgian cartoonist Georges Remi, who wrote under the pen name Hergé. The series was one of the most popular European comics of the 20th century. By 2007, a century after Hergé's birth in 1907, Tintin had been published in more than 70 languages with sales of more than 200 million copies, and had been adapted for radio, television, theatre, and film.
The series first appeared in French on 10 January 1929 in Le Petit Vingtième (The Little Twentieth), a youth supplement to the Belgian newspaper Le Vingtième Siècle (The Twentieth Century). The success of the series saw the serialised strips published in Belgium's leading newspaper Le Soir (The Evening) and spun into a successful Tintin magazine. In 1950, Hergé created Studios Hergé, which produced the canonical versions of ten Tintin albums.
The series is set during a largely realistic 20th century. Its hero is Tintin, a courageous young Belgian reporter and adventurer. He is aided by his faithful dog Snowy (Milou in the original French edition). Other protagonists include the brash and cynical Captain Haddock and the intelligent but hearing-impaired Professor Calculus (French: Professeur Tournesol), as well as the incompetent detectives Thomson and Thompson (French: Dupont et Dupond) and the opera diva Bianca Castafiore.
The series has been admired for its clean, expressive drawings in Hergé's signature ligne claire ("clear line") style. Its well-researched plots straddle a variety of genres: swashbuckling adventures with elements of fantasy, mysteries, political thrillers, and science fiction. The stories feature slapstick humour, offset by dashes of sophisticated satire and political or cultural commentary.Tin Man (miniseries)
Tin Man is a 2007 American television miniseries co-produced by RHI Entertainment and Sci Fi Channel original pictures that was broadcast in the United States on the Sci Fi Channel in three parts. The first part aired on December 2, and the remaining two parts airing on the following nights. It was released to DVD on March 11, 2008; the same year it was rebroadcast in the United Kingdom, Australia, and New Zealand. Starring Zooey Deschanel, Neal McDonough, Alan Cumming, Raoul Trujillo, Kathleen Robertson, and Richard Dreyfuss, the mini-series is a continuation of the classic story The Wonderful Wizard of Oz, with science fiction and additional fantasy elements added. It focuses on the adventures of a small-town waitress named DG who is pulled into a magical realm called the O.Z., ruled by the tyrannical sorceress Azkadellia. Together with her companions Glitch, Raw, and Cain, DG journeys to uncover her lost memories, find her true parents, and foil Azkadellia's plot to trap the O.Z. in eternal darkness.
Costing $20 million to produce, the first part of the mini-series was the highest-rated program in its time slot, with 6.4 million viewers; the mini-series itself would be the highest-rated mini-series of 2007. It was nominated for nine Emmy awards, winning one, and was also nominated for a Critics' Choice Award. Critics gave it mixed reviews, with some praising the acting, soundtrack, and visual effects, while others found it overly grim and bleak.Tin Pan Alley
Tin Pan Alley is the name given to the collection of New York City music publishers and songwriters who dominated the popular music of the United States in the late 19th century and early 20th century. The name originally referred to a specific place: West 28th Street between Fifth and Sixth Avenues in the Flower District of Manhattan; a plaque (see below) on the sidewalk on 28th Street between Broadway and Sixth commemorates it.The start of Tin Pan Alley is usually dated to about 1885, when a number of music publishers set up shop in the same district of Manhattan. The end of Tin Pan Alley is less clear cut. Some date it to the start of the Great Depression in the 1930s when the phonograph, radio, and motion pictures supplanted sheet music as the driving force of American popular music, while others consider Tin Pan Alley to have continued into the 1950s when earlier styles of American popular music were upstaged by the rise of rock & roll, which was centered on the Brill Building.
The origins of the name "Tin Pan Alley" are unclear. One account claims that it was a derogatory reference to the sound of many pianos (comparing them to the banging of tin pans). Others claim it arose from songwriters modifying their pianos to produce a more percussive sound. After many years, the term came to refer to the U.S. music industry in general.Tin Woodman
The Tin Woodman, better known as either the Tin Man or (incorrectly) the Tin Woodsman (the third name appears only in adaptations, the first—and in rare instances, the second—was used by Baum), is a character in the fictional Land of Oz created by American author L. Frank Baum. Baum's Tin Woodman first appeared in his classic 1900 book The Wonderful Wizard of Oz, and reappeared in many other subsequent Oz books in the series. In late 19th-century America, men made out of various tin pieces were used in advertising and political cartoons. Baum, who was editing a magazine on decorating shop windows when he wrote The Wonderful Wizard of Oz, was reportedly inspired to invent the Tin Woodman by a figure he had built out of metal parts for a shop display.Tin can
A tin can, tin (especially in British English, Australian English and Canadian English), steel can, steel packaging or a can, is a container for the distribution or storage of goods, composed of thin metal. Many cans require opening by cutting the "end" open; others have removable covers.
Cans hold diverse contents: foods, beverages, oil, chemicals, etc.
Steel cans are made of tinplate (tin-coated steel) or of tin-free steel. In some dialects, even aluminium cans are called "tin cans".Tin foil hat
A tin foil hat is a hat made from one or more sheets of aluminium foil, or a piece of conventional headgear lined with foil, worn in the belief or hope that it shields the brain from threats such as electromagnetic fields, mind control, and mind reading. The notion of wearing homemade headgear for such protection has become a popular stereotype and byword for paranoia, persecutory delusions, and belief in pseudoscience and conspiracy theories.
Note that "tin foil" is a common misnomer for aluminium foil; packaging metal foil was formerly made out of tin before it was replaced with aluminium.Tin whistle
The tin whistle, also called the penny whistle, flageolet, Irish whistle, Belfast Hornpipe, or feadóg stáin (or simply feadóg) is a simple, six-holed woodwind instrument. It is a type of fipple flute, putting it in the same class as the recorder, Native American flute, and other woodwind instruments that meet such criteria. A tin whistle player is called a whistler. The tin whistle is closely associated with Celtic and Australian folk music.Waste container
A waste container is a container for temporarily storing waste, and is usually made out of metal or plastic. Some common terms are dustbin, garbage can, and trash can. The words "rubbish", "basket" and "bin" are more common in British English usage; "trash" and "can" are more common in American English usage. "Garbage" may refer to food waste specifically (when distinguished from "trash") or to municipal solid waste in general. In 1875, the first household rubbish bins were introduced in Britain to create a regulated system of collection.Wellington Regional Stadium
Wellington Regional Stadium (known as Westpac Stadium through naming rights) is a major sporting venue in Wellington, New Zealand. The stadium's bowl site size is 48,000 sq m.
The stadium was built in 1999 by Fletcher Construction and is situated close to major transport facilities (such as Wellington railway station) one kilometre north of the CBD. It was built on reclaimed railway land, which was surplus to requirements.
It was built to replace Athletic Park, which was no longer considered adequate for international events due to its location and state of disrepair. The stadium was also built to provide a larger-capacity venue for One Day International cricket matches, due to the Basin Reserve ground losing such matches to larger stadia in other parts of the country.
The stadium also serves as a large-capacity venue for concerts.