Formula: AlAsO4
Origin of name: From aluminum and arsenic
Crystal system: Hexagonal
Crystal class: 32
Unit cell: a = 5.031 Å c = 11.226 Å
Colour: Colourless with yellowish, greenish or bluish tint
Diaphaneity: Semi-transparent
Habit: Aggregates, subhedral equant grains to 0.3 mm
Hardness: 4.5 to 5
Specific gravity: 3.32
Cleavage: None
Streak: White
Synonyms/varieties:
Comments: Isostructural with berlinite and quartz; soluble in dilute acids. Found as a fumarolic mineral.
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