Formula: Cu(UO2)2(AsO4)2 . 8H2O
Origin of name: From Greek for lower (hydration) and zeunerite
Crystal system: Tetragonal
Crystal class: 4/m
Twinning:
Unit cell: a = 7.10 Å, c = 17.42 Å
Colour: Pale green, grass-green to emerald-green
Diaphaneity:
Luster: Vitreous
Habit: Crystals rectangular tablets; micaceous, foliated or subparallel aggregates
Hardness: 2 to 2.5
Specific gravity: 3.64
Cleavage: 2; {001} perfect, {100} distinct
Tenacity:
Streak:
Synonyms/varieties:
Comments: Fluoresces dull yellow-green
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