AM_Richterite_41 Formula: O23.98 F.02 Si7.76 Al.08 Ti.71 Fe1.55 Mg2.9 Ca.84 Na1.28 K1.29 H1.18 Name: Richterite Unit cell: 10.031 18.096 5.299 90.0 104.72 90.0 , V=930.31 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 30