AM_Richterite_45 Formula: O23.96 F.04 Si7.52 Al.24 Ti1.14 Fe.7 Mg3.4 Ca.68 Na2.1 K.64 H.88 Name: Richterite Unit cell: 9.908 18.062 5.307 90.0 104.36 90.0 , V=920.06 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 34