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Arsenate minerals Reference Libraries

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Aurichalcite
2005-05-26 12:12:27

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
2005-05-25 10:55:08

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...

Word of the Day
gazingstock
  • A person or thing gazed at with wonder or curiosity, especially of a scornful kind.
The 'stock' of 'gazingstock' comes from an Old English word meaning 'tree trunk' or 'wood'.
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