AM_Spinel_521
Formula:
Al1.834 Mg.995 Cr.162 Mn.002 Zn.007 O4
Name:
Spinel
Unit cell:
8.1445 8.1445 8.1445 90.0 90.0 90.0 , V=540.25
Space group:
FD3M (227)
Martignago F , Dal Negro A , Carbonin S , Physics and Chemistry of Minerals , 30 (2003) p.401-408, How Cr3+ and Fe3+ affect Mg-Al order-disorder transformation at high temperature, in natural spinels, Sample: H-Cr, 3rd run, T = 550 C