O-V, Transitional, Wavenumber of optical phonon

• O-Sr-V
• H-O-V
• Ba-O-Pr-Th-V
• Ba-La-O-Th-V
• H-N-O-S-V
• transitional
• chalcogen
• nonmetal
• non-disordered
• oxide
• monoclinic
• tetragonal
• trigonal
• orthorhombic
• hexagonal