AM_Pargasite_47 Formula: Si7.04 Al1.9 Mg3.69 Fe.49 Ti.02 Cr.04 Ca1.78 Na.944 K.01 H1.96 O23.96 F.04 Name: Pargasite Unit cell: 9.854 17.931 5.282 90.0 105.33 90.0 , V=900.08 Space group: C12/M1 (12)

Hawthorne F C , Oberti R , Sardone N , The Canadian Mineralogist , 34 (1996) p.577-593, Sodium at the A site in clinoamphiboles: the effects of composition, on patterns of order, Sample: A11 - FE229 N.18