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About
The common structure for transition-metal chalcogenides and pnictides: arsenic in hexagonal close packing with nickel filling every octahedral hole. Metal atoms stack in face-sharing columns, giving metallic conduction.
Structure
PrototypeNiAs (B8_1)
Crystal systemhexagonal
Space groupP6_3/mmc (194)
Latticea = 3.619, b = 3.619, c = 5.034 Å
Anglesα 90° · β 90° · γ 120°
Also crystallizes this way
FeS (troilite)NiSCoSFeSe
Sources
- Structure: Crystallography Open Database (COD)
- Lattice parameters: Wyckoff, Crystal Structures — a = 3.619 Å, c = 5.034 Å