Atokite

Formula:  (Pd, Pt)3Sn

Origin of name:  After locality; Atok mine, Transvaal, South Africa

 

Crystal system:  Cubic

Crystal class:  4/m -3 2/m

Twinning:

Unit cell: a = 3.991 Å

 

Colour:  Light cream (when polished)

Diaphaneity: Opaque

Luster:  Metallic

Habit:  As very sparse grains, approximately 100 um 

Hardness:  4.5-5

Specific gravity:  14.9 (calculated)

Cleavage:  None

Tenacity:

Streak:

 

Synonyms/varieties:

 

Comments: Found as very sparse grains in ore concentrates

 

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