Formula: V2Ti3O9
Origin of name: for Werner Schreyer, German mineralogist
Crystal system: monoclinic
Crystal class: unknown
Twinning:
Unit cell:
Colour: reddish brown
Diaphaneity:
Luster:
Habit: highly twinned grains to 30 micron
Hardness: 7
Specific gravity:
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments: dimorphous with kyzylkumite, series with olkhonskite
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