AM_Richterite_68 Formula: K Mg5 (Na Ca.5 Sr.5) Si8 O24 H2 Name: Richterite Unit cell: 10.1063 18.056 5.2717 90.0 105.168 90.0 , V=928.46 Space group: C12/M1 (12)

Robert J-L , Della Ventura G , Raudsepp M , Hawthorne F C , European Journal of Mineralogy , 5 (1993) p.199-206, Rietveld structure refinement of synthetic strontium-rich potassium-richterites