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-Cr, 3rd run, T = 800 C _database_code_amcsd 0008777 8.1503 8.1503 8.1503 90 90 90 *Fd3m .125 .125 .125 atom x y z occ Uiso AlT .125 .125 .125 .257 .0155 MgT .125 .125 .125 .743 .0155 AlM .5 .5 .5 .8355 .0147 MgM .5 .5 .5 .13 .0147 CrM .5 .5 .5 .033 .0147 MnM .5 .5 .5 .0005 .0147 ZnM .5 .5 .5 .001 .0147 O .26165 .26165 .26165 .0183