AM_Sederholmite Formula: Ni Se Name: Sederholmite Unit cell: 3.6613 3.6613 5.3562 90.0 90.0 120.0 , V=62.18 Space group: P63MC (186)

Wyckoff R W G , Crystal Structures , 1 (1963) p.85-237, Second edition. Interscience Publishers, New York, New York, Note: ideal nickel arsenide structure