Chalcogen, Conductor, Oxide, Khan, Phonons

• Ba-Ca-Cu-O-Tl
• Ba-Be-Ca-Cu-O-Tl
• Ba-Ca-Cu-O-Ti-Tl
• Ba-Ca-Cu-Mg-O-Ti-Tl
• Ba-Ca-Cd-Cu-Mg-O-Tl
• wavenumber of optical phonon
• infrared spectra
• vibrational spectra
• energy of optical phonon
• energy of longitudinal optical phonon
• chalcogen
• oxide
• conductor
• transitional
• alkaline
• orthorhombic
• tetragonal
• cubic
• monoclinic
• trigonal