Alkaline, Rare earth, Transitional, Ca-Er

• Ba-Ca-Cu-Er-O
• Ca-Er-Mn-O
• Ca-Er-Nb-O
• Bi-Ca-Cu-Er-O-Sr
• Ca-Cu-Er-O-Pb-Sr-Tl
• thermal and thermodynamic properties
• structural properties
• electronic and electrical properties
• magnetic properties
• phase transitions
• transitional
• alkaline
• rare earth
• lanthanoid
• chalcogen
• orthorhombic
• cubic
• tetragonal
• monoclinic
• trigonal