Formula: PbHAsO4
Origin of name: for Audust de Schulten, Finnish chemist
Crystal system: monoclinic
Crystal class: 2/m
Twinning: fishtail
Unit cell: a = 5.84 Å, b = 6.75 Å, c = 4.86 Å, b = 95.4°
Colour: colourless
Diaphaneity:
Luster: vitreous, brilliant
Habit: crystals flattened, generally have rhombohedral outline and resemble gypsum, faces striated
Hardness: 2.5
Specific gravity: 5.94
Cleavage: 1; {010} good
Tenacity: brittle
Streak: white
Synonyms/varieties:
Comments:
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