AM_Richterite_62 Formula: Na1.574 K.21 Mg4.22 Fe.24 Al.16 Mn.802 Ca.764 Si7.92 H1.67 O23.67 F.33 Name: Richterite Unit cell: 9.891 18.018 5.276 90.0 104.15 90.0 , V=911.74 Space group: C12/M1 (12)

Oberti R , Hawthorne F C , Ungaretti L , Cannillo E , European Journal of Mineralogy , 5 (1993) p.43-51, The behaviour of Mn in amphiboles: Mn in richerite, Sample: MR(1)