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Latest Arsenate minerals Stories

2008-09-04 03:00:18

By Haynes, Patrick E For decades, wonderful, rare, and usually microscopic minerals have been found by hundreds (thousands?) of enthusiastic mineral collectors, both on the surface and in the underground workings of the Gold Hill mine in Tooele County, Utah. On 6 August 2007 the Utah Mined Land Reclamation Program started closing off holes related to former mining and prospecting activity within the Gold Hill mining district, beginning with the Gold Hill mine itself. In anticipation of the...


Latest Arsenate minerals Reference Libraries

28_acf3a79763725412768c5ca1b9da5c84
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".

28_f3c1da53d78f806f3ab9a0bc4a1b6d4f
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 specific gravity is 6.7-7.2. It has a resinous lustre and is coloured yellow, yellowish-brown,...

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Word of the Day
toccata
  • In music, a work for a keyboard-instrument, like the pianoforte or organ, originally intended to utilize and display varieties of touch: but the term has been extended so as to include many irregular works, similar to the prelude, the fantasia, and the improvisation.
This word is Italian in origin, coming from the feminine past participle of 'toccare,' to touch.
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