Alkaline, Lanthanoid, Transitional, Er-Sr

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