Formula: PbSiO3
Origin of name: Locality; Alamos, Sonora, Mexico
Crystal system: Monoclinic
Crystal class: 2/m
Unit cell: a = 12.247 Å, b = 7.059 Å, c = 11.236 Å, b = 113.12°
Colour: Colourless, white
Diaphaneity: Transparent to translucent
Habit: Crystals fibrous, radiating aggregates
Hardness: 4.5
Specific gravity: 6.49
Cleavage: 1; {010} perfect
Streak: White
Synonyms/varieties:
Comments: Found as a rare secondary mineral in the oxidised zone of lead-bearing base metal deposits
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