AM_Richterite_42 Formula: O23.96 F.04 Si7.68 Al.16 Ti.71 Fe2.65 Mg3.8 Ca.86 Na1.23 K1.32 H2 Name: Richterite Unit cell: 10.011 18.06 5.297 90.0 104.77 90.0 , V=926.05 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 31