Arsenic combines readily with all metals into true arsenides, which latter, in general, are soluble in the metal itself.
It may also be accompanied by pyrites, galena, arsenides and antimonides, quartz, calcite, dolomite, &c. It is widely distributed, and is particularly abundant in Germany (the Harz, Silesia), Austro-Hungary, Belgium, the United States and in England (Cumberland, Derbyshire, Cornwall, North Wales).
According to Herbert Lang, its most prominent chance of success is in localities where fuel is dear, and the ores contain precious metals and sufficient sulphides and arsenides to render profitable dressing unnecessary.
Copper combines directly with arsenic to form several arsenides, some of which occur in the mineral kingdom.
Complex silver minerals (sulph-arsenides and antimonides) which are difficult to amalgamate must be made amenable to quicksilver, and the simplest way of doing this is to convert the silver into chloride.
4.1 Chemical Reactivity 4.2 Solubility 4.3 Compounds 4.4 Ferrous Oxide 4.5 Magnetite 4.6 Ferric Acid 4.7 Halogen Compounds 4.8 Ferric Chloride 4.9 Ferrous Bromide 4.10 Sulfur(Sulphur)Compounds 4.11 Nitrides and Nitrates 4.12 Phosphides, Phosphates 4.13 Arsenides and Arsenites 4.14 Carbides, Carbonates 4.15 Medical Uses
Arsenides, Arsenites, &c. - Several iron arsenides occur as minerals; lolingite, FeAs 2, forms silvery rhombic prisms; mispickel or arsenical pyrites, Fe2AsS2, is an important commercial source of arsenic. A basic ferric arsenite, 4Fe2O3 As2O3.5H 2 O, is obtained as a flocculent brown precipitate by adding an arsenite to ferric acetate, or by shaking freshly prepared ferric hydrate with a solution of arsenious oxide.
Metals such as tin, potassium and sodium, when heated in the gas, form arsenides, with liberation of hydrogen; and solutions of gold and silver salts are reduced by the gas with precipitation of metallic gold and silver.