Antic fidancev, Chalcogen

• C-Eu-F-K-O
• B-Fe-Nd-O
• Ba-Er-O-Zn
• Ba-Cu-Er-O
• B-Ge-Nd-O
• electronic and electrical properties
• crystal electric field
• crystal electric field parameter
• optical properties
• structural properties
• chalcogen
• lanthanoid
• rare earth
• quaternary
• transitional
• trigonal
• tetragonal
• orthorhombic
• monoclinic
• cubic