Formula: Na2Ta4O11
Origin of name: from composition
Crystal system: monoclinic
Crystal class: -3 2/m
Twinning:
Unit cell:
Colour: colourless
Diaphaneity: transparent
Luster: adamantine
Habit: as rims around simpsonite, intergrown with microlite
Hardness: 7
Specific gravity:
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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