Formula: (W,Al)(O,OH)3
Origin of name: From aluminum in composition and in analogy to ferritungstite
Crystal system: Cubic, may be rhombohedral, pseudocubic
Crystal class: Unknown
Twinning: Interpenetrant octahedra may represent twins on {111}
Unit cell: a = 10.20 Å
Colour: White
Diaphaneity: Semi-transparant
Habit: Crystals euhedral octahedral, microscopic; aggregated into rounded groups, often intimately intergrown with yttrotungstite and ferritungstite
Specific gravity: 4.52 (calculated)
Cleavage: None
Synonyms/varieties:
Comments: Al analogue of ferritungstite. Observed in fine-grained aggregates of yttrotungstite, also lining cavities relict after ferberite, which has replaced scheelite.
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