Chalcogen, Co-Fe-O, Moessbauer spectra, Trigonal

• Ba-Co-Fe-O
• Ba-Co-Fe-O-Zn
• Ba-Co-Fe-Ni-O
• Co-Fe-La-O-Sr
• Co-Fe-La-Ni-O
• isomer shift
• hyperfine magnetic field
• values of Moessbauer spectra
• quadrupole splitting
• chalcogen
• transitional
• oxide
• disordered
• alkaline