AM_Pargasite_41 Formula: Si6.088 Al2.812 Mg3.82 Fe.64 Cr.04 Ca3.64 Na.933 K.013 H2 O24 Name: Pargasite Unit cell: 9.857 17.932 5.285 90.0 105.36 90.0 , V=900.79 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: F11