AM_Richterite_44 Formula: O23.98 F.02 Si7.44 Al.32 Ti.69 Fe.5 Mg4.13 Ca.84 Na2.13 K.42 H2 Name: Richterite Unit cell: 9.922 18.047 5.297 90.0 104.37 90.0 , V=918.82 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 33