Citation: Smyth, J. R.; Holl, C. M.; Frost, D. J.; Jacobsen, S. D.; Langenhorst, F.; McCammon, C. A. (2003). Structural systematics of hydrous ringwoodite and water in Earth's interior Sample: Ringby4. American Mineralogist, 88, pp. 1402-1407.
Formula: Mg1.996 O4 Si
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Mg16 O32 Si8 (Mg2 O4 Si)
Multiplicity: 1
RCSR Symbol: spl
Coordination sequences: