AM_Pargasite_13 Formula: O24 (Si7.68 Al.52) Mg4.98 Ca1.82 Na.14 Name: Pargasite Unit cell: 9.816 18.04 5.2775 90.0 104.741 90.0 , V=903.78 Space group: C12/M1 (12)

Sharma A , Jenkins D M , American Mineralogist , 84 (1999) p.1304-1318, Hydrothermal synthesis of amphiboles along the tremolite-pargasite join, and in the ternary system tremolite-pargasite-cummingtonite, Sample: PARG 18-3