cobaltite

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cobaltite

cobaltite , 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.

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"cobaltite." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 16 Dec. 2009 <http://www.encyclopedia.com>.

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cobaltite

A Dictionary of Earth Sciences | 1999 | | Â© A Dictionary of Earth Sciences 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

cobaltite (cobalt glance) Mineral, CoAsS; sp. gr. 6.0–6.5; hardness 5–6; cubic; from white to dark grey or greyish-black, all with a reddish tinge; grey–black streak; metallic lustre; crystals octahedra, cubes, and pentagonal-dodecahedra, also occurs massive, and in irregular grains; cleavage perfect cubic; occurs mainly in hydrothermal veins and contact metamorphic zones, and is associated with chalcopyrite, sphalerite, chlorite, tourmaline, and apatite. It is one of the principal ore minerals for cobalt.

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AILSA ALLABY and MICHAEL ALLABY. "cobaltite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 16 Dec. 2009 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "cobaltite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (December 16, 2009). http://www.encyclopedia.com/doc/1O13-cobaltite.html

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cobalt

World Encyclopedia | 2005 | Â© World Encyclopedia 2005, originally published by Oxford University Press 2005. (Hide copyright information) Copyright

cobalt (symbol Co) Metallic element, a transition metal, discovered c.1735. It is found in cobaltite and smaltite, but mostly obtained as a by-product during the processing of other ores. Cobalt is a constituent of vitamin B¹². It is used in high-temperature steel, artists' colours (cobalt blue), jet engine manufacture, cutting tools and magnets. Cobalt-60 (half-life 5.26yr) is an artificial isotope used as a source of gamma rays in radiotherapy and tracer studies. Properties: at.no. 27; r.a.m. 58.9332; r.d. 8.9; m.p. 1495°C (2723°F); b.p. 2870°C (5198°F); most common isotope Co⁵⁹ (100%).

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	The Design-of-Experiment Optimization and Development of Cobaltite Ore Mineral Processing Magazine article from: JOM; 10/1/2006; ; 700+ words ; ...optimization of mineral processing of cobaltite ore with limited representative sample...fundamentals. MINERAL PROCESSING TESTING OF A COBALTITE ORE Because of client budget constraints...Formation. The main cobalt ore mineral is cobaltite (CoFe)AsS while the main copper mineral...
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	Findings from V.R. Galakhov and co-authors provide new insights into applied materials science. Newspaper article from: Physics Week; 3/3/2009; 614 words ; ...electronic structure of defective lithium cobaltites Li (x) CoO2 (0.6a parts per thousand...it was established that in defective cobaltites the electronic holes are localized mainly...Electronic structure of defective lithium cobaltites Li (X) CoO2. Applied Physics a...
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	Reports outline applied physics study findings from J. Geshev and colleagues. Newspaper article from: Physics Week; 5/19/2009; 641 words ; ...shifted along both field and magnetization axes of layered cobaltites," scientists in Porto Alegre, Brazil report. "The authors...Applied Physics (Comment on ''Exchange bias in the layered cobaltite Sr1.5Pr0.5CoO4'' [J. Appl. Phys. 104, 023914...
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