Chalcogen, Disordered, Oxide, Tetragonal, Values of moessbauer spectra

• Ba-Cu-Fe-O-Y
• Fe-Mo-O-Sr
• Fe-La-O-Sr
• Ce-Cu-Fe-O-Sr-Y
• Ba-Cu-Eu-O
• oxide
• disordered
• chalcogen
• transitional
• alkaline