AM_Pargasite_42 Formula: Si6.096 Al2.814 Mg3.81 Fe.44 Cr.04 Ca1.8 Na.915 K.01 H2 O24 Name: Pargasite Unit cell: 9.854 17.935 5.285 90.0 105.31 90.0 , V=900.88 Space group: C12/M1 (12)

Oberti R , Hawthorne F C , Ungaretti L , Cannillo E , The Canadian Mineralogist , 33 (1995) p.867-878, [6]Al disorder in amphiboles from mantle peridotites, Sample: F12