Chalcogen, Rare earth, Transitional, Er-Gd

• Er-Gd-K-O-W
• Er-Gd-O-V-Yb
• Er-Gd-O-V
• Ba-Cu-Er-Gd-O
• Er-Ga-Gd-O-Sc
• structural properties
• thermal and thermodynamic properties
• electronic and electrical properties
• optical properties
• phase transitions
• transitional
• rare earth
• chalcogen
• lanthanoid
• quinary
• monoclinic
• orthorhombic
• tetragonal
• cubic
• trigonal