H-Y, H-x polyhedra, Optical properties, Rare earth

• Ba-Cu-H-O-Y
• C-H-Y
• Fe-H-Y
• Ce-H-Ni-Y
• phonons
• vibrational spectra
• Raman spectra
• optical spectra
• wavenumber of longitudinal optical phonon
• transitional
• rare earth
• non-disordered
• binary
• metal
• trigonal
• cubic
• orthorhombic
• tetragonal