Modderite

Formula:  (Co,Fe)As

Origin of name:  After locality; Modderfontein, Transvaal, South Africa

 

Crystal system:  Orthorhombic

Crystal class:  2/m 2/m 2/m

Twinning: 

Unit cell: 

 

Colour:  Bluish white

Diaphaneity:  Opaque

Luster:  Metallic

Habit:  Grains, 0.01 - 0.05 mm

Hardness:  4

Specific gravity:  8.28

Cleavage:  None

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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