Formula: (UO2)8O2(OH)12.12H2O
Origin of name: for A. Schoep, Belgian mineralogist
Crystal system: orthorhombic
Crystal class: mm2
Twinning:
Unit cell: a = 14.33 Å, b = 16.79 Å, c = 14.73 Å
Colour: sulphur yellow to lemon-yellow, brownish yellow
Diaphaneity:
Luster: adamantine, pearly on cleavage
Habit: crystals tabular, pseudohexagonal or prismatic, dense microcrystalline aggregates, rare
Hardness: about 2.5
Specific gravity: 4.8
Cleavage: 2; {001} perfect, {010} imperfect
Tenacity: brittle
Streak: pale yellow powder
Synonyms/varieties: epiianthinite
Comments:
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