Chalcogen, Transitional, Kemmler sack, Tetragonal

• Bi-Fe-O-Sr
• Bi-Cu-Fe-O-Sr-Y
• Bi-Fe-La-O-Sr
• Cu-Fe-O-Pb-Sr-Y
• Fe-O-Pb-Sr
• magnetic properties
• structural properties
• electronic and electrical properties
• superconductivity
• Moessbauer spectra
• transitional
• chalcogen
• oxide
• alkaline
• conductor