Formula: K3Na(UO2)(CO3)3 . H2O
Origin of name: Locality; Grimsel area, Bern Switzerland
Crystal system: Hexagonal
Crystal class: -6m2
Twinning:
Unit cell:
Colour: Yellow
Diaphaneity:
Luster:
Habit: Crystals; anhedral grains in aggregates forming crusts
Hardness: 2 to 2.5
Specific gravity: 3.30
Cleavage: None
Tenacity:
Streak: Pale yellow
Synonyms/varieties:
Comments:
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