IrSe2 Wyckoff R W G Crystal Structures 1 (1963) 239-444 Second edition. Interscience Publishers, New York, New York _database_code_amcsd 0011775 20.94 5.93 3.74 90 90 90 Pnam atom x y z Ir1 -.076 -.427 .25 Ir2 -.304 -.442 .25 Se1 .007 .270 .25 Se2 -.121 -.045 .25 Se3 .237 .324 .25 Se4 -.363 -.074 .25