Rare earth, Valence

• Ba-Cu-O-Y
• La-Mn-O-Sr
• Ca-La-Mn-O
• Al-Yb
• Se-Tm
• electronic and electrical properties
• valence or charge transfer
• conductivity or resistivity
• ferroelectric hysteresis
• rare earth
• lanthanoid
• transitional
• chalcogen
• non-disordered
• orthorhombic
• tetragonal
• cubic
• hexagonal
• monoclinic