Formula: (Sr,Pb)(Y,U)(Ti,Fe)20O38
Origin of name: For Gabor Dessau, Italian mineralogist
Crystal system: Hexagonal
Crystal class: Unknown
Twinning:
Unit cell:
Colour: Black
Diaphaneity: Opaque
Luster: Metallic
Habit: Flattened rhombohedral crystals, tabular, hexagonal outline, up to 1 mm across x 0.2 mm thick
Hardness: 7
Specific gravity: 4.68
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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