Chalcogen, Lanthanoid, Rare earth, Karppinen, Tetragonal

• Ce-Cu-Mo-O-Sr-Y
• Ce-Cu-Fe-O-Sr-Y
• Ba-Fe-Gd-O
• Cu-Gd-O-Ru-Sr
• Cu-La-O-Sr
• magnetic properties
• electronic and electrical properties
• structural properties
• valence or charge transfer
• superconductivity
• transitional
• rare earth
• lanthanoid
• chalcogen
• alkaline