Osmium

Formula: Os

Origin of name: from Greek osme = a smell

 

Crystal system: hexagonal

Crystal class: 6/m 2/m 2/m

Twinning: 

Unit cell: 

 

Colour: steel-gray

Diaphaneity: opaque

Luster: metallic

Habit: crystals tabular, rarely short prismatic, irregular flattened grains and cleavage flakes

Hardness: 7

Specific gravity: 22.48

Cleavage: 1; {0001} perfect

Tenacity: 

Streak: gray

 

Synonyms/varieties:

 

Comments: 

 

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