AM_Ilvaite_26
Formula: Ca Fe2.85 Mg.03 Al.04 Mn.08 Si2 O9 H
Name: Ilvaite
Unit cell: 13.012 8.809 5.849 90.0 90.02 90.0 , V=670.43
Space group: P121/A1 (14)

Carrozzini B , European Journal of Mineralogy , 6 (1994) p.465-479, Crystal structure refinements of ilvaite: new relationships, between chemical composition and crystallographic parameters, Sample: Rio Marina X