Formula: CaSnSi3O9.2H2O
Origin of name: for G. Stokes, British mathematician
Crystal system: orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: colourless
Diaphaneity:
Luster: vitreous, pearly on {100}
Habit: crystals pyramidal, large {010} faces
Hardness: 6
Specific gravity: 3.19
Cleavage: 2; {110} perfect, {010} poor
Tenacity:
Streak: white
Synonyms/varieties:
Comments:
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