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The chemical formula of mineral Cobaltpentlandite is indicated by Co9S8. Cobaltpentlandite is usually found occurring with other sulfides and arsenides in hydrothermal veins. This mineral is most commonly found at the Langis mine, Casey Township, Cobalt-Gowganda area, Ontario, and the Vauze mine, north of Noranda, Quebec Canada. Cobaltpentlandite was named for the cobalt content and the relationship with pentlandite. Mineral Cobaltpentlandite is known to crystallize in the isometric system of crystal formation. In optical mineralogy, this isometric crystal system comprises crystals having three axes, all of which are perpendicular to one another and all are found equal in lengths. Mineral Cobaltpentlandite is commonly found colored yellow in hand sample. Most crystals are found opaque in appearance. The hardness measure of mineral Cobaltpentlandite is usually found ranging from 4 to 5 when evaluated using the Mohs scale method. Mineral Cobaltpentlandite is commonly found showing metallic luster in reflected light of polarized microscopes. The interference color of mineral Cobaltpentlandite is usually found slightly lighter bronze yellow than pentlandite. Mineral Cobaltpentlandite is usually found not radioactive.

 



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Wednesday, August 31st, 2011 at 4:39 am
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Optical Mineralogy
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