A uulution of this salt under the name of ft/humor/ate of lin, or is extensively used in dyeing and calico-printing. It forms double =ha with alkaline chlorides.
.5alphur and Tin combine in three proportions. Tho protosulphide (SnS) in prepared by adding to melted tin an equal weight of sulphur, and stirring the mixture till combination is effected; the product is to be powdered when cold, mixed with an equal weight of sulphur, and thrown in small portions into a hot crucible, and eventually heated to redness. It Is of a bluiali-black colour, luog a metallic lustre, fuses at a red heat, and when cooled has a lamollated texture. When hydro sulphuric acid gas is lamed into a solution of protochlorido of tin, a similar compound is obtained. Hydrochloric acid dissolves protosul phide of tin with the evolution of hydrosulphurio acid gas, a solution of the protochloride of tin being formed.
Sesquieulphids of Tin prepare this, finely-powdered itrotosulplude of tin is to ho mixed with a third of Its weight of sulphur, and the mixture is to be boated to moderato relates until sulphur is no longer volatilised. It has a deep grayish-yellow colour, and when strongly heated is re-convertod to the state of protosulphide; u heated inn hydrochloric acid, hydrosulphuric gad is givuu out.
Itisulohide of Tin (SnS,) may do prepared in different modes. When hydrosulphuric acid or hydrostilphate of ammonia is added to a solution of bichlorido of tin, a bulky precipitato of a dirty yellow colour is obtained ; this is hydrated biaulphide of tin : in the dry way it is procured by heating in a retort 12 parts of tin amalgamated with Ojtarts of mercury, rubbed up with 7 parts of and 6 of chloride of ammonium ; the mercury facilitates the coin inatiou of the tin and sulphur, and the animoniacal salt, by its evaporation, appears to prevent the temperature becoming so high as to decompose the bisulphide of tin formal. This substance, formerly known to tho
alchemists by the Immo of .1urung muerum, or Mosaic (told, isle crystal lino scales; and sometimes in six-aided plates, of a golden-yellow colour and metallic lustre. It is not soluble in any acid, but nascent chlorine, in the farm of what is called aqua regia, dissolves it ; it is soluble also in solution of potash and soda, forming what have been tomeh sulphur salts. It is used in the arts to give an appoarance of bronze to the surface of metals.
Phosphide ft( Tin is readily formed by adding phosphorus to tho melted metal ; it is of a silvery-white colour, and soft enough W ho cut with the knife. After fusion it crystallises on cooling; when thrown upon a red-hot coal, the phosphorus burns. This compound does not appear to have been accurately analysed. When phosphuretted hydro gen is made to act upon a solution of protochloride of a phosphide Is formed, which is readily oxidised by the action of the air.
Iodides of Tin.—To prepare the protiodide (Sn1), 2 parts of granu lated tin are to be heated with f parts of iodine ; the resulting iodide is a rod translucent subatance, very fusible, soluble in water,aud volatile at a high temperature.
The Period of Tin (SnI,) is formed by dissolving the hydrated peroxide of tin, precipitated by an alkali from the solution of the bichlorido, in hydriodic acid; it forme crystals of a silky lustre, which aro resolved by boiling water into peroxide of tin and hydriodic acid.
Sclenido of Tin.-111eu tin is fused with selenium, they combine with the evolution of light. The compound formed is a spongy mass, of a gray colour and metallic lustre; when heated, selenium is expelled and peroxide of tin remains.