H-Y, H-x polyhedra, Phonons

• Ba-Cu-H-O-Y
• C-H-Y
• vibrational spectra
• Raman spectra
• wavenumber of longitudinal optical phonon
• phonon density of states
• phonon dispersion
• transitional
• rare earth
• non-disordered
• binary
• metal
• trigonal
• orthorhombic
• cubic