Formula: Pb2(UO2)(AsO4)2
Origin of name: For A. Hallimond, British mineralogist
Crystal system: Triclinic
Crystal class: -1
Twinning:
Unit cell:
Colour: Yellow
Diaphaneity: Transparent to translucent
Luster: Subadamantine
Habit: Crystals tabular, elongated parallel to the c-axis, microscopic
Hardness: 2.5 to3
Specific gravity: 6.39
Cleavage: None
Tenacity:
Streak: Pale yellow
Synonyms/varieties:
Comments:
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