AM_Epidote_3 Formula: Ca2 Si3 Al2.6 Fe.4 O13 H Name: Epidote Unit cell: 8.8802 5.6043 10.1511 90.0 115.455 90.0 , V=456.15 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 LEP