Cobalt

Symbol Co, element, transition metal.
Cobalt has been found in its native state in alloys of natural meteoric iron in a few places on Earth, and in Moon rocks, but it is not proposed as a new mineral species (Mindat).
Specific gravity: 8.9
Colour: Bluish white
Melting point: 1495o
Boiling point: 2930o
Abundance: 25 parts per million by weight, 8 parts per million by moles in the Earth's crust, 4 parts per million by weight, 0.7 parts per million by molesin the Solar System (ChC).
Oxidation states -1, 0, 5, 3 (ChC)

The main ores of cobalt are cobaltite, erythrite, glaucodot and skutterudite. Cobalt is generally produced as a by-product of nickel and copper mining (ChC).

Cobalt-bearing minerals include:

Sulphides
cobaltite
cobaltpentlandite
costibite
glaucodot
linnaeite
willyamite

Arsenides
clinosafflorite
safflorite
skutterudite

Carbonates
spherocobaltite

Selenites
cobaltomenite

Arsenate
cobaltarthurite
cobaltaustinite
cobaltkoritnigite
cobaltlotharmeyerite
erythrite
roselite

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