AM_Ilvaite_9 Formula: Ca Fe2.81 Mg.06 Al.08 Mn.05 Si2 O9 Name: Ilvaite Unit cell: 13.008 8.802 5.842 90.0 90.0 90.0 , V=668.89 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 = 660 deg C