Raman scattering from NH/sub 4//sup +/ and ND/sub 4//sup +/ in beta-alumina

Journal Article · Fri Aug 15 04:00:00 EDT 1980 · J. Chem. Phys.; (United States)

OSTI ID:5190706

Bates, J B; Kaneda, T; Wang, J C; Engstrom, H

Polarized Raman spectra in the internal and external mode region of NH/sub 4//sup +/ and ND/sub 4//sup +/ ions in beta-alumina have been measured. The forms of the scattering tensors for the internal modes are calculated taking into account the disordered distribution of ions on the crystallographic sites and treating each ion as an independent scattering center. The results of the analysis suggest that the ammonium ions occupy three nonequivalent sites in beta-alumina. Model calculations indicate that the ions prefer the Beevers--Ross and midoxygen sites with the C/sub 2/ axes of the ions located in the conducting plane. The librational modes of NH/sub 4//sup +/ and ND/sub 4//sup +/ evidently occur in the region from 200 to 450 cm/sup -1/, but overlap with phonons of the host lattice precludes positive identification. The in-plane and out-of-plane translational modes are identified in the region between 100 and 200 cm/sup -1/.

• Research Organization: Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• OSTI ID: 5190706
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 73:4; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
CALCULATION METHODS
CHARGED PARTICLES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DEUTERIUM COMPOUNDS
DISTRIBUTION
HYDRIDES
HYDROGEN COMPOUNDS
IONS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
PHONONS
POLARIZATION
QUASI PARTICLES
RAMAN SPECTRA
SCATTERING
SPECTRA
TENSORS