AM_Richterite_34 Formula: O24 Si7.6 Al.16 Ti.49 Fe.7 Mg4.05 Ca.92 Na1.17 K1.29 H2 Name: Richterite Unit cell: 10.029 18.061 5.296 90.0 104.78 90.0 , V=927.54 Space group: C12/M1 (12)

Oberti R , Vannucci R , Zanetti A , Tiepolo M , Brumm R C , American Mineralogist , 85 (2000) p.407-419, A Crystal Chemical re-evaluation of amphibole/melt and amphibole/clinopyroxene, DTi values in petrogenetic studies, SAMPLE 23