Nierite

Formula: Si3N4

Origin of name: for Alfred Nier, American chemist

 

Crystal system: hexagonal

Crystal class: 3m

Twinning: 

Unit cell: 

 

Colour: colourless

Diaphaneity: transparent

Luster: 

Habit: 0.4 by 2 micron laths

Hardness

Specific gravity: 3.11

Cleavage: 

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: found in meteorites

 

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