Formula: Pb(UO2)2(PO4)2.4H2O
Origin of name: for N. Przhevalsky, Russian explorer
Crystal system: orthorhombic
Crystal class: unknown
Twinning:
Unit cell:
Colour: bright yellow, with faint greenish tint
Diaphaneity:
Luster: vitreous to adamantine
Habit: crystals tabular, 0.1 to 1 mm, in foliated aggregates
Hardness:
Specific gravity:
Cleavage: 1; {001} distinct
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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