AM_Fluororichterite_5 Formula: Si8 Mg5 (Na2 Ca2) K2 O22 F2 Name: Fluororichterite Unit cell: 9.992 17.972 5.26 90.0 105.8 90.0 , V=908.88 Space group: I12/M1 (12)

Cameron M , Sueno S , Papike J J , Prewitt C T , American Mineralogist , 68 (1983) p.924-943, High temperature crystal chemistry of K and Na fluor-richterites, K fluor-richterite 24C