Formula: U(UO2)3(PO4)2(OH)6.4H2O
Origin of name: for Maurice Van Meerssche, Belgian crystallographer
Crystal system: orthorhombic
Crystal class: mm2
Twinning:
Unit cell: a = 17.06, b = 16.76, c = 7.023
Colour: Yellow
Diaphaneity:
Luster:
Habit: Plates, elongated
Hardness: 2 to 3
Specific gravity: 4.67
Cleavage: 2; {010} good, {100} indistinct
Tenacity:
Streak: Light yellow
Synonyms/varieties:
Comments:
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