Uranosilite

Formula: USi7O17

Origin of name: from elements in compositon

 

Crystal system: Orthorhombic

Crystal class: 222 or 2/m 2/m 2/m

Twinning:

Unit cell: a = 11.6, b = 14.68, c = 12.83

 

Colour: Yellowish white

Diaphaneity: Semitransparent

Luster: Vitreous

Habit: Crystals acicular, crystals are only visible under the scanning electron microscope at high magnification

Hardness

Specific gravity: 3.25

Cleavage: None

Tenacity: 

Streak: White

 

Synonyms/varieties:

 

Comments:  Radioactive

 

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