Alkaline, Apatite, Chalcogen, Rare earth, Optical properties

• Ce-O-P-Si-Sr
• Ca-Eu-F-O-P-Sr
• Ba-Cl-Eu-O-P
• Ca-Eu-La-O-Si
• Eu-Mg-O-Si-Y
• luminescence
• photoluminescence spectra
• wavelength for luminescence
• phonons
• chromaticity diagram
• rare earth
• alkaline
• apatite
• chalcogen
• lanthanoid
• hexagonal
• trigonal