AM_Epidote_2 Formula: Si3 Ca2 Al2.16 Fe.84 H O13 Name: Epidote Unit cell: 8.8877 5.6275 10.1517 90.0 115.383 90.0 , V=458.73 Space group: P121/M1 (11)

Gabe E J , Portheine J C , Whitlow S H , American Mineralogist , 58 (1973) p.218-223, A reinvestigation of the epidote structure: Confirmation of the iron location, sample HEP