AM_Ringwoodite_5 Formula: Si (Mg.436 Fe1.564) O4 Name: Ringwoodite Unit cell: 8.2059 8.2059 8.2059 90.0 90.0 90.0 , V=552.56 Space group: FD3M (227)

Hazen R M , Downs R T , Finger L W , American Mineralogist , 78 (1993) p.1320-1323, Crystal chemistry of ferromagnesian silicate spinels: Evidence for Mg-Si, disorder, Sample: SUNY 1102