Urancalcarite

Formula: Ca(UO2)3(CO3)(OH)6.3H2O

Origin of name: from composition

 

Crystal system: Orthorhombic

Crystal class: mm2 or 2/m 2/m 2/m

Twinning:

Unit cell: a = 15.42, b = 16.08, c = 6.97

 

Colour: Brigth yellow

Diaphaneity: Transparent

Luster: Vitreous

Habit: Crystals acicular, in radiating aggregates to 4 mm

Hardness: 2 to 3

Specific gravity: 4.03

Cleavage: None

Tenacity: 

Streak: Light yellow

 

Synonyms/varieties:

 

Comments:  Radioactive

 

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