NiSi2 Wyckoff R W G Crystal Structures 1 (1963) 239-444 Second edition. Interscience Publishers, New York, New York Fluorite structure _database_code_amcsd 0011702 5.395 5.395 5.395 90 90 90 Fm3m atom x y z Ni 0 0 0 Si .25 .25 .25