Nickeline Wyckoff R W G Crystal Structures 1 (1963) 85-237 Second edition. Interscience Publishers, New York, New York Note: ideal nickel arsenide structure _database_code_amcsd 0011580 3.602 3.602 5.009 90 90 120 P6_3mc atom x y z Ni 0 0 0 As 1/3 2/3 .25