Formula: Bi(Ta,Nb)O4
Origin of name: From bismuth and tantalite
Crystal system: Orthorhombic
Crystal class: mm2
Twinning:
Unit cell:
Colour: Light brown to black
Diaphaneity:
Luster: Adamantine to submetallic
Habit: Crystals stout prismatic, large; massive
Hardness: 5
Specific gravity: 8.51
Cleavage: 2; {010} perfect, {101} distinct
Tenacity:
Streak: Yellow-brown to black
Synonyms/varieties:
Comments:
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