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

• Ba-Cu-Fe-O-Y
• Ba-Fe-Nd-O
• Ba-Fe-O-Pb
• Ba-Ca-Cu-Fe-O-Y
• Ba-Fe-O-Pb-Sn
• values of Moessbauer spectra
• isomer shift
• quadrupole splitting
• hyperfine magnetic field
• transitional
• alkaline
• chalcogen
• oxide
• disordered