AM_Richterite_48 Formula: Na1.87 Ca.98 Mg5 Si8 O24 H2 Name: Richterite Unit cell: 9.9032 17.9885 5.2692 90.0 104.25 90.0 , V=909.79 Space group: C12/M1 (12)

Senda K , Ishida K , Jenkins D M , American Mineralogist , 90 (2005) p.1062-1071, X-ray Rietveld refinement and FTIR spectra of synthetic (Si,Ge)-richterites, Sample: Ge0Ri, Na in A site, Si100Ge0