MgAl2O4 Kojitani H, Hisatomi R, Akaogi M American Mineralogist 92 (2007) 1112-1118 High-pressure relations and crystal chemistry of calcium ferrite-type solid solutions in the system MgAl2O4-Mg2SiO4 Note: synthesized from MgAl2O4 spinel at 27 GPa and 2200 C Note: data collected at room conditinos _database_code_amcsd 0004381 9.9498 8.6468 2.7901 90 90 90 Pbnm atom x y z Biso Mg .3503 .7576 .25 .64 Al1 .3854 .4388 .25 .39 Al2 .8964 .4159 .25 .30 O1 .8344 .2005 .25 1.59 O2 .5279 .1201 .25 .84 O3 .2150 .5357 .25 .88 O4 .5709 .4089 .25 1.57