Monoclinic, Nonmetal, Quaternary, Optics

• Cs-H-O-S
• Li-O-Rb-S
• K-Nb-S-Ta
• B-Ca-Gd-O
• Gd-Na-O-P
• phonons
• luminescence
• wavenumber of optical phonon
• optical absorption
• values of luminescence
• nonmetal
• quaternary
• chalcogen
• transitional
• non-disordered