Chalcogen, Rare earth, Eu-W, Optical properties

• Eu-K-O-W
• Eu-O-Sr-W
• Eu-Lu-O-W
• Ca-Eu-O-W
• Eu-Li-O-W
• luminescence
• photoluminescence spectra
• values of luminescence
• wavelength for luminescence
• phonons
• transitional
• lanthanoid
• rare earth
• chalcogen
• nonmetal
• monoclinic
• tetragonal
• orthorhombic
• triclinic
• hexagonal