Iridosmine

Formula:  (Os,Ir)

Origin of name:  From composition

 

Crystal system:  Hexagonal

Crystal class:  6/m 2/m 2/m

Twinning: 

Unit cell: 

 

Colour:  White, with bluish-gray tinge in reflected light

Diaphaneity:  Opaque

Luster:  Metallic

Habit:  Rounded grains, rarely hexagonal cross section

Hardness:  6 to 7

Specific gravity:  22.15

Cleavage:  None

Tenacity: 

Streak:  Grey

 

Synonyms/varieties:

 

Comments: 

 

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