AM_Ringwoodite_4 Formula: Si (Mg.42 Fe1.58) O4 Name: Ringwoodite Unit cell: 8.203 8.203 8.203 90.0 90.0 90.0 , V=551.97 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 1097