Formula: Pb2AgCl3(F,OH)2
Origin of name: For Richard Bideaux, American mineralogist
Crystal system: Cubic
Crystal class: 4/m -3 2/m
Twinning:
Unit cell: a = 14.13 Ǻ
Colour: Colourless
Diaphaneity:
Luster: Adamantine
Habit: Crystals small; massive
Hardness: 3
Specific gravity: 6.274
Cleavage: None
Tenacity: Conchoidal; brittle, nearly sectile
Streak: White
Synonyms/varieties:
Comments: On exposure to strong light becomes pale lavender and dull
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