Formula: PbU7O22.12H2O
Origin of name: for Adrien Vandendriessche (1914-1940), Belgian mineralogist and geologist.
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell: a = 14.07 Å, b = 40.85 Å, c = 43.33 Å
Colour: orange to amber, brownish yellow, yellow orange
Diaphaneity: Transparent to translucent
Luster: Adamantine
Habit: crystals prismatic, tabular or pseudohexagonal, dense microcrystalline aggregates, intimately intergrown with metavandendriesscheite in dens microcrystalline aggregates
Hardness: about 3
Specific gravity: 5.45
Cleavage: 1; {001} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments: Radioactive
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