Ilvaite_4 Formula: Ca Fe2.81 Mg.06 Al.08 Mn.05 Si2 H O9 Name: Ilvaite Unit cell: 13.005 8.8 5.847 90.0 90.0 90.0 , V=669.15 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 = 500 deg C