AM_Ilvaite_8 Formula: Ca Fe2.81 Mg.06 Al.08 Mn.05 Si2 O9 Name: Ilvaite Unit cell: 13.007 8.805 5.844 90.0 90.0 90.0 , V=669.29 Space group: PNAM (62)

Bonazzi P , Bindi L , American Mineralogist , 84 (1999) p.1604-1612, Structural adjustments induced by heat treatment in ilvaite, Sample: RM at T = 625 deg C