Formula: CaV4O9.5H2O
Origin of name: for J. Simplot, American mine owner
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: dark green, thin flakes yellow green
Diaphaneity:
Luster: vitreous
Habit: micaceous plates, hemispherical aggregates
Hardness: about 1
Specific gravity: 2.64
Cleavage: 1; {010} micaceous
Tenacity:
Streak: brownish black
Synonyms/varieties:
Comments:
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