Formula: (Pb,Ca)U2O7.2H2O
Origin of name: after locality Wölsendorf, Bavaria, Germany
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m, mm2 or 222
Twinning:
Unit cell: a = 11.95 Å, b = 13.99 Å, c = 7.02Å
Colour: Orange-red to carmine-red
Diaphaneity: Semitransparent
Luster: Vitreous, adamantine
Habit: crystalline masses, nodules, also spherulites, platy, aggregates
Hardness: 5
Specific gravity: 6.8
Cleavage: 1; {001} good
Tenacity:
Streak:
Synonyms/varieties: Woelsendorfite
Comments: Radioactive
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