AM_Ringwoodite_6 Formula: Si Mg1.996 O4 Name: Ringwoodite Unit cell: 8.0633 8.0633 8.0633 90.0 90.0 90.0 , V=524.25 Space group: FD3M (227)

Smyth J R , Holl C M , Frost D J , Jacobsen S D , Langenhorst F , McCammon C A , American Mineralogist , 88 (2003) p.1402-1407, Structural systematics of hydrous ringwoodite and water in Earth s interior, Sample: Ringby4