aurichalcite


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aurichalcite

[‚ȯr·ə′kal‚sīt]
(mineralogy)
(Zn,Cu)5(CO3)2(OH)6 Pale-green or pale-blue mineral consisting of a basic copper zinc carbonate and occurring in crystalline incrustations. Also known as brass ore.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Thousands of rejas of adamite, hemimorphite, aurichalcite, calcite, etc., known in the trade as "Mapimi mix," were produced.
Aurichalcite (Zn,[Cu.sup.2+])[.sub.5](C[O.sub.3])[.sub.2](OH)[.sub.6]
There, for the first time, turquoise-blue aggregates, less than 0.5 mm wide, of sharp, elongated platy crystals of aurichalcite were discovered.
Hemimorphite is seen in cavities in dolomite, as aggregates of colorless lath-shaped crystals with right-angled profiles measuring less than 1 mm, with adamite, aurichalcite and blue-green mixed crystals belonging to the malachite-rosasite series.
At the beginning of the 1990's, a specimen labeled as "aurichalcite" from Pastrana (Murcia) was handed to one of the authors (BSB).
The 79 mine in Arizona, to cite yet another example, produced some of the most beautiful, soft-looking druses of puffy acicular aurichalcite ever found anywhere.
Aurichalcite [(Zn,[Cu.sup.2+]).sub.5][([CO.sub.3]).sub.2][(OH).sub.6]
In limonite ores in the Andrdassy I section, aurichalcite is found rarely in small crevices as thin, transparent, pale blue, platy crystals and crystal groups associated with cerussite, brochantite, malachite and zincrosasite (Szakall, 1992).
Associated minerals include calcite, cerussite, aurichalcite and zincrosasite (Szakdll, 1992).
Aurichalcite [(Zn,Cu).sub.5][([CO.sub.3]).sub.2][(OH).sub.6)]
Blue to blue-green aurichalcite spherules up to 8 mm in size are found at the Brenner and Verchniy mines.
Another southern Arizona display featured the large Loris Woolery collection, including superb orange scheelite crystals from the Cohen mine (the best up to 7 inches tall!), an excellent nest of cuprite crystals, a beautiful suite of wulfenite specimens, azurites, malachites, aurichalcites and much more.