Kieftite

Formula:  CoSb3

Origin of name:  For Cornelius Kieft, Dutch mineralogist

 

Crystal system:  Cubic

Crystal class:  2/m -3

Twinning: 

Unit cell: 

 

Colour:  Tin white

Diaphaneity:  Opaque

Luster:  Metallic

Habit:  Euhedral to subhedral equant crystals to 400 µm

Hardness:  5

Specific gravity:  7.2

Cleavage:  None

Tenacity: 

Streak:  Grey

 

Synonyms/varieties:

 

Comments: 

 

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