AM_Richterite_33 Formula: Mg5 Ca K3 Si8 H2 O24 Name: Richterite Unit cell: 10.1926 18.1209 5.2736 90.0 105.514 90.0 , V=938.54 Space group: C12/M1 (12)

Yang H , Konzett J , Prewitt C T , Fei Y , American Mineralogist , 84 (1999) p.681-684, Single-crystal structure refinement of synthetic K-substituted potassic, richterite, K(KCa)Mg5Si8O22(OH)2