Mg-x polyhedra, Moessbauer spectra, Transitional

• Fe-Mg-O
• Ba-Fe-O
• Cu-Fe-Mg-O
• Fe-Mg-Mn-O
• Fe-H-Mg-O-Se
• isomer shift
• values of Moessbauer spectra
• hyperfine magnetic field
• quadrupole splitting
• alkaline
• transitional
• disordered
• chalcogen
• oxide
• cubic
• hexagonal
• orthorhombic
• triclinic
• trigonal