AM_Forsterite_15 Formula: (Fe1.1 Mg.75 Mn.15) Si O4 Name: Forsterite Unit cell: 4.899 10.419 6.08 90.0 90.0 90.0 , V=310.34 Space group: PBNM (62)

Smyth J R , Hazen R M , American Mineralogist , 58 (1973) p.588-593, The crystal structures of forsterite and hortonolite at several temperatures, up to 900 C, Note: variety hortonolite, T = 900 C