Formula: NiAs2-3
Origin of name: from nickel and skutterudite
Crystal system: cubic
Crystal class: 2/m -3
Twinning: on {112} sixlings
Unit cell: a = 8.28 Å
Colour: silver-gray to tin-white, may tarnish iridescent or gray
Diaphaneity:
Luster: metallic
Habit: crystals cubic, octahedral or cubo-octahedral, reticulated or distorted aggregates, massive, fine granular
Hardness: 5.5 to 6
Specific gravity: 6.5
Cleavage: 3; {001} and {111} distinct, {011} traces
Tenacity: conchoidal to uneven, brittle
Streak: black
Synonyms/varieties: chloanthite (As-poor variety)
Comments: Ni analogue of skutterudite, series with skutterudite
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