Spinel Martignago F, Dal Negro A, Carbonin S Physics and Chemistry of Minerals 30 (2003) 401-408 How Cr3+ and Fe3+ affect Mg-Al order-disorder transformation at high temperature in natural spinels Sample: L-Fe, 1st run, T = 450 C _database_code_amcsd 0008813 8.1281 8.1281 8.1281 90 90 90 *Fd3m .125 .125 .125 atom x y z occ Uiso AlT .125 .125 .125 .849 .0103 FeT .125 .125 .125 .011 .0103 MgT .125 .125 .125 .131 .0103 AlM .5 .5 .5 .893 .0090 FeM .5 .5 .5 .0345 .0090 MgM .5 .5 .5 .0715 .0090 O .26323 .26323 .26323 .0099