KMg.9Cu.1F3 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 = 0.100 _database_code_amcsd 0007944 3.9894 3.9894 3.9894 90 90 90 Pm3m atom x y z occ K .5 .5 .5 Cu 0 0 0 .100 Mg 0 0 0 .900 F .5 0 0