Violarite

Formula: FeNi2S4

Origin of name: from Latin violaris = of violet

 

Crystal system: cubic

Crystal class: 4/m -3 2/m

Twinning:

Unit cell: 

 

Colour: light gray to steel-gray, rapidly tarnished copper-red or violet-gray

Diaphaneity: opaque

Luster: metallic

Habit: massive, granular to compact

Hardness: 4.5 to 5.5

Specific gravity: 4.5 to 4.8

Cleavage: 1; {001} imperfect

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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