Urusovite

FormulaCuAlAsO5

Origin of name: For Vadim Sergeevich Urusov of Moscow State University, Russia.

 

Crystal system: Monoclinic

Crystal class: 2/m

Twinning: 

Unit cell: a = 7.314, b = 10.223, c = 5.576, β = 99.79°

 

Colour: Light green

Diaphaneity: Translucent

Luster: Vitreous

Habit: Platy, microscopic

Hardness: 4

Specific gravity

Cleavage: 1; {010} perfect

Tenacity: Brittle

Streak: White

 

Synonyms/varieties:

 

Comments: 

 

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