Formula: Ba(Ta,Nb)2(O,OH)7
Origin of name: From barium and microlite
Crystal system: Cubic
Crystal class: 4/m B3 2/m
Twinning:
Unit cell:
Colour: Pink to reddish, yellowish brown, colourless to white
Diaphaneity:
Luster:
Habit: Massive
Hardness: 4.5 to 5
Specific gravity: 5.68 to 5.7
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments: Ba analogue of microlite
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