KCuF3 Burns P C, Hawthorne F C, Hofmeister A M, Moret S L Physics and Chemistry of Minerals 23 (1996) 141-150 A structural phase-transition in K(Mg1-xCux)F3 perovskite Sample: x = 1.000 _database_code_amcsd 0007931 5.8604 5.8604 7.8528 90 90 90 I4/mcm atom x y z K 0 0 .25 Cu 0 .5 0 F1 0 .5 .25 F2 .2230 .7230 0