Formula: Fe4N
Origin of name: for Roald Nielsen, Danish electron-microprobe specialist
Crystal system: cubic
Crystal class: -43m
Twinning:
Unit cell:
Colour: white in reflected light
Diaphaneity:
Luster:
Habit: elongated platy inclusions, 1 to 2 micron
Hardness: 5.5 to 6
Specific gravity: 7.21
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments: in iron meteorites
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