AM_Cummingtonite_3
Formula: Fe2.622 Mg4.254 Al.014 Ca.11 Si8 O24
Name: Cummingtonite
Unit cell: 9.5048 18.1343 5.3077 90.0 102.009 90.0 , V=894.83
Space group: P121/M1 (11)

Yang H , Hirschmann M M , American Mineralogist , 80 (1995) p.916-922