Cubic, Fe-Mg-O, Mg-x polyhedra, Moessbauer spectra

• Cu-Fe-Mg-O
• Fe-Mg-Mn-O
• Cr-Fe-Mg-O
• Fe-Mg-O-Zn
• isomer shift
• values of Moessbauer spectra
• hyperfine magnetic field
• quadrupole splitting
• transitional
• chalcogen
• alkaline
• disordered
• oxide