Chalcogen, Oxide, Charge transfer, Tetragonal

• Ba-Ca-Cu-O-Tl
• Cu-La-O-Sr
• Fe-Mo-O-Sr
• Mn-O
• O-Ru-Sr
• effective charge
• values of valence or charge transfer
• electron density maps
• average number of 4f electrons
• chalcogen
• oxide
• transitional
• alkaline
• disordered