Apatite, Chalcogen, Rare earth, Phonons

• La-O-Si
• Eu-H-O-Sr-V
• F-La-O-P-Si-Sr
• Nd-O-Si-Sr
• Ca-H-La-O-P
• infrared spectra
• Raman spectra
• wavenumber of optical phonon
• vibrational spectra
• wavenumber of longitudinal optical phonon
• chalcogen
• apatite
• rare earth
• lanthanoid
• disordered
• hexagonal