Formula: (Ba,Sr)2(Nb,Ti)2(O,OH)7
Origin of name: From barium and pyrochlore
Crystal system: Cubic
Crystal class: 4/m -3 2/m
Twinning:
Unit cell:
Colour: Yellowish grey to light olive-gray
Diaphaneity:
Luster:
Habit: Crystals small with octahedral form
Hardness: 4.5 to 5
Specific gravity: 4.0
Cleavage: 1; {111} poor
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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