Ca-F, F-x polyhedra, Hexagonal, Optical properties

• Ca-F-O-P
• C-Ca-F-O-P
• C-Ca-F-K-O
• Ca-F-Gd-Na-O-P
• Ca-F-Na-O-P-Sm
• phonons
• wavenumber of optical phonon
• luminescence
• wavelength for luminescence
• non-linear optics
• fluoride
• halogen
• alkaline
• chalcogen
• nonmetal