Sederholmite

Formula: NiSe

Origin of name: for J. Sederholm, Finnish geologist

 

Crystal system: hexagonal

Crystal class: 6/m 2/m 2/m

Twinning:

Unit cell: 

 

Colour: yellow to orange yellow (polished section)

Diaphaneity: opaq;ue

Luster: 

Habit: massive, embedded grains

Hardness

Specific gravity: 7.06

Cleavage: none

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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