Phase H Bindi L, Nishi M, Tsuchiya J, Irifune T American Mineralogist 99 (2014) 1802-1805 Crystal chemistry of dense hydrous magnesium silicates: The structure of phase H, MgSiH2O4, synthesized at 45 GPa and 1000 C Locality: Synthetic _database_code_amcsd 0020313 4.733 4.3250 2.8420 90 90 90 Pnnm atom x y z occ Uiso Mg 0 0 0 .5 .0127 Si 0 0 0 .5 .0127 O .3473 .2303 0 .0178 H .475 .042 0 .5