senarmontite


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senarmontite

[‚sen·ər′män‚tīt]
(mineralogy)
Sb2O3 A colorless or grayish mineral composed of native antimony trioxide occurring in masses or as octahedral crystals.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The oxide minerals such as senarmontite, valentinite, kermesite and stibiconite, if present, directly react with HCl without requiring FeCl3 during leaching process.
The pH controlled by ammonium hydroxide in this range facilitates the production of antimony trioxide with senarmontite crystals [25].
Senarmontite and kermesite from Xikuangshan, although mentioned in the literature (Wu et al., 1990), have not been taken out in collector-quality specimens.
The oxidation zones of the deposits generally contain stibiconite, valentinite and senarmontite. Kermesite has been said to come from Xikuangshan, although no such specimens have appeared on the mineral market.
Cervantite occurs as white concretional aggregates after senarmontite (Ruzbacka, 1968) and as yellowish to brownish coatings on stibiconite (Andras and Chovanec, 1985).
However, X-ray powder patterns showed senarmontite ([Sb.sub.2][O.sub.3]) as the only mineral present!
Other fine antimony minerals found at the Cetine mine are cinnabar, cervantite, coquandite, kermesite, onoratoite, mopungite, senarmontite, stibiconite and valentinite.
The large crystals of senarmontite from Hamimat, Constantine, are classic, and while considered by most to represent the world's finest for the species, are seldom available in good specimens today.