Ringwoodite Smyth J R, Holl C M, Frost D J, Jacobsen S D, Langenhorst F, McCammon C A American Mineralogist 88 (2003) 1402-1407 Structural systematics of hydrous ringwoodite and water in Earth's interior Sample: SZ0107 _database_code_amcsd 0003161 8.09027 8.09027 8.09027 90 90 90 *Fd3m .125 .125 .125 atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) SiTet .125 .125 .125 .995 .00458 .00458 .00458 0 0 0 MgOct .5 .5 .5 .854 .00489 .00489 .00489 -.00042 -.00042 -.00042 FeOct .5 .5 .5 .103 .00489 .00489 .00489 -.00042 -.00042 -.00042 O .24354 .24354 .24354 .00530 .00530 .00530 -.00030 -.00030 -.00030