maldonite

maldonite

[′mal·də‚nīt]
(mineralogy)
Au2Bi A pinkish silver-white mineral consisting of gold and bismuth; occurs in massive granular form.
References in periodicals archive ?
Gold occurs as very fine grains of <100 [mu]m, and as an intergrowth with maldonite ([Au.sub.2] Bi).
* Physical lock-up (if the fine gold particles can be liberated by economic grinding the gold is locked, if they can not, the gold is encapsulated), * Carbonaceous materials (active carbon in the material adsorbs the gold from solution), * Decomposition of host minerals (sulphides decompose to form cyanicides and deplete the oxygen), * Coated gold (particles associated with sulphides in contact with a lixiviant can develop coatings), and * Insoluble alloys or compounds of gold (gold-bearing tellurides and arsenides, aurostibnite ([AuSb.sub.2]), and maldonite ([Au.sub.2] Bi)).