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 ?
Cobaltites REBa[Co.sub.2][O.sub.6-[delta]], where REis a rare earth metal, with the double perovskite structure have attracted great attention in the past decade due to their unique properties such as high oxide ion and electronic conductivity as well as very promising activity as cathodes in IT SOFCs [1-5].
2007: An extremely rich cobaltite vein is discovered on the north
[3] first reported the superconductivity behavior (Tc ~ 5K) in the hydrated form of sodium cobaltite [Na.sub.x][Co.sub.2][O.sub.4] x y[H.sub.2]O, as displayed in Fig.
Fang, "Nickel cobaltite nano structures for photoelectric and catalytic applications," Small, vol.
Cobaltite, one of the most recently formed cobalt sulfarsenides, occurs in minute octahedral crystals associated with erythrite in a safflorite vein.
Finally, sulfides (pyrite, pyrrhotite, lollingite, chalcopyrite, cobaltite, bismuthinite) were deposited.
In addit ion there were Scandinavian classics like loose, sharp 2-cm pyritohedrons of cobaltite and sharp, lustrous pseudo-octahedrons of glaucodot from Sweden; well crystallized leucophanite, columbite and thortveitite from Norway; and richly brownish red, euhedral crystals of eudialyte to 2 cm in complex ultra-alkaline matrix, not from the Kola Peninsula, Russia, but from 19th-century localities in Greenland.
Probe standards are as follows: cobaltite (As); gahnite (Zn); spessartine (Mn); forsterite (Mg); fayalite (Fe); kyanite (Al).
Cobaltite occurs rarely in the cleft fillings with pyrite and chlorite, as crystals of octahedral, cuboctahedral and tetrahedral habits.
Cobaltite has never been reported from the stratiform and vein-like deposits of Katanga; there is practically no arsenic present in those orebodies.