Chalcogen, Transitional, Er-Ta

• Er-O-Ta
• Ca-Er-O-Ta
• Er-K-Nb-O-Ta
• Er-K-O-Ta
• Er-Eu-O-Ta
• thermal and thermodynamic properties
• electronic and electrical properties
• structural properties
• optical properties
• phase transitions
• transitional
• rare earth
• chalcogen
• lanthanoid
• oxide
• cubic
• monoclinic
• orthorhombic
• tetragonal
• trigonal