Apatite, Disordered, Rare earth, Hexagonal, Optical properties

• Ce-O-P-Si-Sr
• Ba-Cl-Eu-O-P
• Eu-Mg-O-Si-Y
• Ca-Eu-La-O-Si
• Ba-Eu-F-Gd-Na-O-P
• luminescence
• photoluminescence spectra
• wavelength for luminescence
• phonons
• values of luminescence
• disordered
• rare earth
• apatite
• chalcogen
• lanthanoid