Chalcogen, Lanthanoid, Transitional, Er-Y

• Al-Er-O-Y
• Er-O-Y
• Ba-Cu-Er-O-Y
• Er-O-Y-Yb
• Er-Fe-O-Y
• thermal and thermodynamic properties
• structural properties
• optical properties
• electronic and electrical properties
• luminescence
• transitional
• lanthanoid
• chalcogen
• rare earth
• disordered
• cubic
• monoclinic
• tetragonal
• orthorhombic
• trigonal