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Bi2S3 A mineral consisting of bismuth trisulfide, which has an orthorhombic structure and is usually found in fibrous or leafy masses that are lead gray with a yellowish tarnish and a metallic luster. Also known as bismuth glance.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(also called bismuth glance), a mineral belonging to the sulfide compounds. Chemical composition, Bi2S3 (81.30 percent Bi, 18.70 percent S), sometimes with admixtures of lead, copper, iron, arsenic, antimony, and other metals. It crystallizes in a rhombic system. The structure consists of linked Bi-S-Bi chains along the C axis. It normally forms acicular crystals, lamellae, radial growths, and fibrous or granular aggregates. It is opaque and silvery-white, with a metallic luster. It tarnishes and becomes covered with a gray film when exposed to air. Its hardness is 2-2.5 on the mineralogical scale, and its density is 6,780-6,810 kg per cu m.

Bismuthinite is formed in hydrothermal, greisen and contact-metasomatic deposits together with arsenopyrite; sulfides of Zn, Pb, Cu, and Fe; and minerals of tin, tungsten and molybdenum, native bismuth, and others. In a zone of oxidation it breaks down slightly and forms secondary oxides (bismite), sulfoxides, and aqueous bismuth carbonates. Bismuthinite is the main mineral from which bismuth is extracted.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
A vug in the footwall of the Contacto vein, on Level 250, yielded brilliant crystals of arsenopyrite, wolframite, jamesonite and bismuthinite perched on spongy quartz.
Cannizzarite and bismuthinite crystals from the crater rim fumaroles contain up to 200 and 2500 mg/kg of thallium, respectively.
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A few hundred such specimens in all were found, Stefan said, last summer at the Nandan mine, Guangxi; there was some thought at first that the brilliant metallic black crystals might be bismuthinite, but Guanghua Liu assures us that they are stibnite.
The actinolite occurs as parallel to radiating crystals in fibrous masses, and rarely as slender elongated crystals embedded in bismuthinite. It commonly shows an asbestose texture.
Very similar specimens found at earlier times at Julcani have been identified as bismuthinite and/or boulangerite.
Other less attractive but interesting species include bismuth minerals (native bismuth, bismuthinite, cosalite, bismutite), tungsten minerals (scheelite, ferberite) and several borates including ludwigite in large, radiated masses, inderite, szaibelyite and canavesite-a species described in 1978 for which Brosso is the type and, so far, only locality.
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Finally, sulfides (pyrite, pyrrhotite, lollingite, chalcopyrite, cobaltite, bismuthinite) were deposited.
Bismuthcontaining minerals found include native bismuth, bismite, bismutite, bismuthinite, and beyerite (Jahns and Wright, 1951).
Felbertailte is always intimately intergrown with argentian lillianite and, rarely, with cannizzarite, Se-free junoite, Se-free proudite, bismuthinite derivatives and cosalite.