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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