AM_Pargasite_2 Formula: O22 F2 (Si6 Al2) Mg4.52 Cr.48 Ca2 Na Name: Pargasite Unit cell: 9.8402 17.98 5.2914 90.0 105.108 90.0 , V=903.83 Space group: C12/M1 (12)

Raudsepp M , Turnock A C , Hawthorne F C , Sherriff B L , Hartman J S , American Mineralogist , 72 (1987) p.580-593, Characterization of synthetic pargasitic amphiboles