Formula: PbAl3(AsO4)(SO4)(OH)6
Origin of name: Locality; State of Hidalgo, Mexico
Crystal system: Hexagonal
Crystal class: -3 2/m
Twinning:
Unit cell:
Colour: White, light gray, light green
Diaphaneity: Translucent to nearly opaque
Luster: Dull, chalky
Habit: Massive, dense, porcelain-like; porous or cavernous
Hardness: 4.5
Specific gravity: 3.96
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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