Tin block (Sn)产品概况

The English name of tin is tin, and the element symbol is Sn. "Tin is a metallic element, an inorganic substance, and a low melting point metal with a silvery white luster. It is divalent or tetravalent in compounds and will not be oxidized by air at room temperature. Tin has 14 isotopes, of which 10 are stable isotopes, namely, tin - 112, 114, 115, 116, 117, 118, 119, 120, 122, and 124.".

Metallic tin is soft and flexible, with a melting point of 231.89 ℃ and a boiling point of 2260 ℃. There are three types of allotropes:

White tin is a tetragonal crystal system, with cell parameters of a=0.5832nm and c=0.3181nm. The cell contains four Sn atoms, with a density of 7.28g/cm3, a hardness of 2, and good ductility.

Grey tin is a diamond shaped cubic crystal system with a cell parameter of a=0.6489nm, containing 8 Sn atoms in the cell, and a density of 5.75g/cm3.

Brittle tin is an orthogonal crystal system with a density of 6.54g/cm3.

Tin is so soft that you can cut it with a knife. Tin has stable chemical properties and is not easily oxidized by oxygen at room temperature, so it often maintains the shiny luster of silver. Tin is non-toxic, and it is often plated on the inner wall of copper pots to prevent copper from forming toxic copper green (basic copper carbonate) with warm water. The formation of a tin dioxide protective film on the surface of tin in air is stable, and the oxidation reaction is accelerated under heating; Tin reacts with halogen under heating to generate tin tetrahalide; It can also react with sulfur; Tin is soluble in strong alkaline solutions; It can be corroded in acidic solutions of salts such as iron chloride and zinc chloride.