Sanmartinite

Formula: (Zn,Fe)WO4

Origin of name: for Jose de San Martin, liberator of Argentina

 

Crystal system: monoclinic

Crystal class: 2/m

Twinning:

Unit cell: 

 

Colour: dark brown to brownish black

Diaphaneity: 

Luster: resinous

Habit: crystals tabular, microscopic, reticulated aggregates, massive, fine-granular

Hardness

Specific gravity: 6.70

Cleavage: 1; {010} perfect

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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