cobaltite


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cobaltite

(kō`bôltīt, kōbôl`tīt), opaque, silver-white, sometimes reddish or grayish mineral of the pyrite group, a compound of cobalt, arsenic, and sulfur, CoAsS. It occurs in crystals of the cubic system, also in compact to granular masses. It is an important ore of cobalt, found chiefly in Sweden, Norway, India, and Azerbaijan.

Cobaltite

 

a mineral, cobalt sulfoarsenide, CoAsS; one of the complex sulfoarsenides. Cobaltite contains 35.41 percent Co, 45.26 percent As, and 19.33 percent S; the cobalt may be partially replaced by iron and nickel (varieties of ferrocobaltite and nickel cobaltite). Cobaltite crystallizes in a cubic system, existing as crystals of cubic habit, as well as in more complex combined forms (pentagonal dodecahedron, octahedron, and so on). Granular aggregates are the most common. Cobaltite is yellowish white in color, tinged with pink; it is nontransparent and has a metallic luster. Hardness on the mineralogical scale, 5.5; density, 6,100–6,400 kg/m3. Cobaltite usually occurs in contactmetasomatic deposits together with pyrrhotite, pyrite, arsenopyrite, chalcopyrite, and other sulfides, in hydrothermal gold-quartz lodes, and in lodes containing Co-Ni-Ag-Bi-U formations. Cobaltite is one of the main ore minerals for the preparation of cobalt and its alloys and compounds.

G. P. BARSANOV

cobaltite

[kə′bȯl‚tīt]
(mineralogy)
CoAsS A silver-white mineral with a metallic luster that crystallizes in the isometric system, resembling crystals of pyrite; it is one of the chief ores of cobalt. Also known as cobalt glance; gray cobalt; white cobalt.
References in periodicals archive ?
to mine the site of the cobaltite vein on Mont Demon for 20 years in
c] of the hydrated sodium cobaltite is far below the [T.
Cobaltite, one of the most recently formed cobalt sulfarsenides, occurs in minute octahedral crystals associated with erythrite in a safflorite vein.
Katanga Crescent Outside of Stratiform Vein-like Katanga Cresent Cobalt Cobalt Cobalt Deposits Deposits(*) Deposits(**) Primary Linnaeite Linnaeite Linnaeite Minerals Carrollite Carrollite Carrollite Cattierite Cobaltite Siegenite Trogtalite Penroseite Secondary Heterogenite-3R Heterogenite-3R Heterogenite-3R Minerals Heterogenite-2H Oursinite Kolwezite Comblainite Sphaerocobaltite Cobaltomenite Julienite * Shinkolobwe ** Kipushi
About a mile WNW of Vermaak's there is another mine in the same range, and the lovely rash on the rocks shows cobalt bloom, and an attempt with the hammer produces cobaltite.
Nevertheless, this display contains some marvelous pieces, and the informed visitor will be suitably impressed by such Swedish specialties as the world's best pyrosmalite, edingtonite and cobaltite.
Mark Mauthner of the University of British Columbia reports that some good specimens of cobaltite from the Merry Widow mine at Benson Lake, near Port McNeil (on Vancouver Island, British Columbia) were collected in the fall of 1992 by Don Graham of Vancouver.
Arsenopyrite with galena, octahedral sphalerite, siderite and quartz from [ILLUSTRATION FOR FIGURE 1 OMITTED] the Drebachs Hoffnung mine at Marienberg in Saxony; Cobaltite from [ILLUSTRATION FOR FIGURE 2 OMITTED] Joachimsthal, Bohemia, Czechoslovakia; and Cobaltite from [ILLUSTRATION FOR FIGURE 3 OMITTED] Tunaberg, Sweden.
Cobalt is an accessory element in Kipushi ore, cobaltite being the best represented species as grayish white masses with a metallic luster in chalcopyrite and/or bornite.