Chalcogen, Lanthanoid, Khanna

• Ca-Eu-Mo-O
• Ca-Eu-O-W
• Eu-Mo-O-Y
• Eu-Gd-Mo-O
• Eu-Mg-Mo-O
• optical properties
• luminescence
• wavelength for luminescence
• photoluminescence spectra
• chromaticity diagram
• chalcogen
• rare earth
• lanthanoid
• luminescent
• transitional
• tetragonal
• monoclinic
• cubic
• orthorhombic
• trigonal