Formula: Hg4SbO3(OH)3
Origin of name: for Feliks Shakov, Russian geochemist
Crystal system: monoclinic
Crystal class: m
Twinning:
Unit cell:
Colour: olive-green to bright lettuce-green
Diaphaneity:
Luster:
Habit:
Hardness: 3 to 3.5
Specific gravity: 8.34 to 8.51
Cleavage: 2; parallel to elongation
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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