Bismutite

Also found in: Wikipedia.

bismutite

[′biz·məd‚īt]

(mineralogy)

(BiO)₂CO₃ A dull-white, yellowish, or gray, earthy, amorphous mineral consisting of basic bismuth carbonate. Also known as bismuth spar.

Bismutite

a mineral of the oxycarbonate bismuth group. Its chemical composition is Bi₂(CO₃)O₂. It crystallizes in a tetragonal arrangement. Bismutite forms powdery masses or, less often, fibrous crusts consisting of submicroscopic crystalline particles. Bismutite’s hardness on the mineralogical scale measures 3–3.75; its density varies between 7,400 and 8,300 kg/m³. Its color ranges from grayish white or greenish yellow to brown and grey. It forms as a result of the oxidation of native bismuth, as well as bismuthinite, during the action of surface carbonated solutions. Quartz, topaz, and arsenopyrite, among others are bismutite’s associated minerals. Deposits of bismutite are found in Transbaikalia, Kazakhstan, and Middle Asia. Abroad they are found in Czechoslovakia, the German Democratic Republic, Mexico, the USA, and other countries.

Mentioned in ?

bismuth spar

References in periodicals archive ?

1 -mm) scaly bismutite and bismoclite crystals occur as an early constituent in some vugs with chlorargyrite, arsentsumebite and wulfenite, at the Reward mine.

The Brown Monster and Reward mines: Inyo County California

Bismutite has been reported from Llallagua by Petrov et al.

Famous mineral localifies: Llallagua, Bolivia

azurite, bismutite, brochantite, lanthanite-(Ce), malachite and wroewolfite, are of secondary origin and may have formed there as a result of post-mining processes.

Famous mineral localities: the Bastnas mines; Riddarhyttan ore field, Bergslagen district, Vastmanland, Sweden

Occurrence: Associated minerals are: quartz, cobaltneustadtelite, preisingerite and goethite; rarely with mixite, zeunerite and bismutite.

Abstracts of new mineral descriptions

Occurrence: Associated minerals are: quartz, neustadtelite, preisingerite and goethite; rarely with mixite, zeunerite and bismutite.

Abstracts of new mineral descriptions

Bismuthcontaining minerals found include native bismuth, bismite, bismutite, bismuthinite, and beyerite (Jahns and Wright, 1951).

Gem and rare-element pegmatites of Southern California

Occurrence: Associated minerals are: pucherite, schumacherite, bismutite and hechtsbergite.

Dukeite

Bismutite has been identified as an alteration product in the Bor pit.

Famous Mineral Localities: DAL'NEGORSK PRIMORSKIY KRAY RUSSIA

Additional accessory minerals identified in the Malkhanskiy district include manganocolumbite, monazite, ixiolite, struverite, bismuthinite, bismutite, topaz, spessartine, cesian beryl, biotite, amazonite and fluorite.

THE MINERALS OF RUSSIA: 22ND ANNUAL FM-TGMS-MSA MINERALOGICAL SYMPOSIUM

18) Kaolinite + Montmorillonite + Bismutite + Quartz

THE ALTO LIGONHA PEGMATITES MOZAMBIQUE

bismutite, chabazite, chrysocolla, cuprite, goethite, gypsum, huntite, malachite, molybdite, nontronite, stilbite and thulite.

ABATRACTS OF THE 21ST ANNUAL FM-TGMS-MSA MINERALOGICAL SYMPOSIUM THE MINERALS of BRAZIL

It is commonly associated with other bismuth minerals including native bismuth, bismuthinite, bismutite, bismite, beyerite, eulytite, pucherite, schumacherite and clinobisvanite.