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

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