Arsenate minerals Reference Libraries
Aurichalcite is a mineral, usually found as a secondary mineral in copper and zinc deposits. Its chemical formula is (Zn,Cu)5(CO3)2(OH)6. The name probably originates from the Greek oreichalchos meaning "mountain copper".
Vanadinite is a mineral with the formula Pb5(VO4)3Cl, lead chlorovanadate. It is part of a series with two other minerals: pyromorphite (Pb5(PO4)3Cl) and mimetite (Pb5(AsO4)3Cl). It has hexagonal crystals, usually prismatic but the crystals are often skeletal or cavernous and it may be found in crusts. It is brittle and has an uneven fracture. The hardness of vanadinite is 2.75-3 and its...
- A coin originally worth six pennies Scots, and later three; held equivalent to an English halfpenny.
- (in plural) Money; cash.