Paxite

Formula: CuAs2

Origin of name: from Latin pax = peace

 

Crystal system: monoclinic, pseudo-orthorhombic

Crystal class: 2/m

Twinning: 

Unit cell: 

 

Colour: light steel-gray, tarnishes to black

Diaphaneity: opaque

Luster: metallic

Habit: massive, lamellar

Hardness: 3.5 to 4

Specific gravity: about 5.3

Cleavage: 1; perfect

Tenacity: 

Streak: black

 

Synonyms/varieties:

 

Comments: 

 

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