B-x polyhedra, Moessbauer spectra, Tetragonal

• B-Fe-Nd
• Fe-Mo-O-Sr
• B-Fe-Y
• Cu-Fe-O
• Fe-P-Sr
• values of Moessbauer spectra
• isomer shift
• hyperfine magnetic field
• quadrupole splitting
• transitional
• non-disordered
• ferromagnetic
• metalloid
• ferrimagnet