Formula: Mg(UO2)2(AsO4)2 . 4 - 8H2O
Origin of name: From Greek meta - after and novacekite
Crystal system: Tetragonal
Crystal class: 4/m
Twinning:
Unit cell:
Colour: Yellow, dull pale yellow
Diaphaneity: Nearly opaque
Luster:
Habit: Crystals rectangular plates; crusts; porous interlocking aggregates; lamellar aggregates
Hardness: 2.5
Specific gravity: 3.51
Cleavage: 3; {001} perfect, {010} and {110} indistinct
Tenacity:
Streak:
Synonyms/varieties:
Comments: Fluoresces dull green
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