AM_Pargasite_45 Formula: Si7.24 Al1.12 Mg3.69 Fe.73 Ti.1 Cr.28 Ca1.48 Na1.12 K.176 H1.94 O23.94 F.06 Name: Pargasite Unit cell: 9.87 17.991 5.291 90.0 105.08 90.0 , V=907.17 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: A9 - BM47 N.1