Formula: Ba(UO2)2(AsO4)2 . 10-12H2O
Origin of name: For E. Heinrich, American mineralogist
Crystal system: Tetragonal
Crystal class: 4/m 2/m 2/m
Twinning:
Unit cell:
Colour: Yellow to green
Diaphaneity: Transparent to translucent
Luster: Vitreous to pearly
Habit: Crystals tabular
Hardness: 2.5
Specific gravity: 3.61
Cleavage: 2; {001} perfect, {100} distinct
Tenacity:
Streak:
Synonyms/varieties:
Comments: Fluoresced bright green to greenish yellow
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