AM_Richterite_52 Formula: Na1.62 Ca.84 Mg5 Ge8 O24 H2 Name: Richterite Unit cell: 10.3244 18.282 5.3994 90.0 106.015 90.0 , V=979.59 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: Ge8Ri, Si0Ge100