Pargasite_4 Formula: O22 F2 (Si6 Al2) Mg4.038 Sc.962 Ca2 Na Name: Pargasite Unit cell: 9.8852 18.1574 5.3186 90.0 105.213 90.0 , V=921.18 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