Hydroxil ions in scheelite type molybdates and tungstates

L. Kovács, A. Péter, L. I. Ivleva, A. Baraldi, R. Capelletti

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The presence of hydroxil ions has been detected for the first time in as-grown scheelite type crystals. A number of stretching vibrational bands were observed in PbMoO4 and BaWO4 crystals at 8 K, while only very weak OH- absorption was found in CaMoO4, SrMoO 4 and SrWO4 in the 3200-3600 cm-1 wavenumber range. The anharmonicity of the stretching modes for all bands in PbMoO 4 and BaWO4 was found to be in agreement with that observed in other oxides. The model of weak coupling to a single phonon band was used to interpret the temperature dependence of the OH- band positions and halfwidths. Strong polarization dependence was observed for the OH- vibrations in both crystals indicating that the O-H dipoles incorporate the lattice along different O-O bonds.

Original languageEnglish
Pages (from-to)856-859
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Volume4
Issue number3
DOIs
Publication statusPublished - 2007

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scheelite
tungstates
molybdates
ions
crystals
dipoles
vibration
temperature dependence
oxides
polarization

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Hydroxil ions in scheelite type molybdates and tungstates. / Kovács, L.; Péter, A.; Ivleva, L. I.; Baraldi, A.; Capelletti, R.

In: Physica Status Solidi (C) Current Topics in Solid State Physics, Vol. 4, No. 3, 2007, p. 856-859.

Research output: Contribution to journalArticle

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