Birefringent, Nonmetal, Phonons

• Li-Nb-O
• Cs-H-O-S
• Ag-Ga-S
• B-Cu-O
• Gd-Mo-O
• Raman spectra
• wavenumber of optical phonon
• infrared spectra
• vibrational spectra
• Brillouin spectra
• birefringent
• nonmetal
• chalcogen
• non-disordered
• transitional
• trigonal
• tetragonal
• orthorhombic
• monoclinic
• cubic