AM_KMg20Cu80F3 Formula: K (Cu.8 Mg.2) F3 Name: KMg.20Cu.80F3 Unit cell: 5.8311 5.8311 7.8746 90.0 90.0 90.0 , V=267.75 Space group: I4/MCM (140)

Burns P C , Hawthorne F C , Hofmeister A M , Moret S L , Physics and Chemistry of Minerals , 23 (1996) p.141-150, A structural phase-transition in K(Mg1-xCux)F3 perovskite, Sample: x = 0.800