AM_Richterite_55 Formula: O22.737 (F1.263 Na1.172) K.724 Fe.012 Mg4.983 Mn.004 Ca1.098 Si7.887 Al.018 Ti.002 H.737 Name: Richterite Unit cell: 9.97 17.985 5.273 90.0 104.81 90.0 , V=914.09 Space group: C12/M1 (12)

Oberti R , Ungaretti L , Cannillo E , Hawthorne F C , European Journal of Mineralogy , 4 (1992) p.425-439, The behaviour of Ti in amphiboles: I. Four- and six-coordinate Ti in richterite, Sample: R(3) Potassium-fluor-richterite