Dynamics of the NH4+ ion in ABX3 perovskites |
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| Affiliation: | 1. Dpt. Optica y Estructura de la Materia, Universidad Autonoma de Madrid, Spain;2. Dpt. Electroquimica, Universidad Autonoma de Madrid, Spain;1. Institute of Geosciences, Goethe Universität, Altenhöferallee 1, 60438 Frankfurt am Main, Germany;2. ESRF The European Synchrotron, 71 Avenue des Martyrs, Grenoble F-38000, France;3. Bayerisches Geoinstitut, Universität Bayreuth, 95440 Bayreuth, Germany;4. Dassault Systemes BIOVIA, 334 Science Park, Cambridge CB4 0WN, UK;5. Department of Physics, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK;6. ISIS Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot OX11 0QX, UK;1. University of Sfax, Faculty of Sciences, Laboratory of Condensed Matter, BP1171, 3018 Sfax, Tunisia;2. LUNAM Université, Université du Maine, CNRS UMR 6283, Institut des Molécules et Matériaux du Mans(IMMM), Avenue Olivier Messiaen, F-72085, Le Mans Cedex 09, France |
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| Abstract: | ![]()
The Raman and ir spectra of NH4MnF3, NH4ZnF3 and NH4MnCl3 have been measured in order to study the internal vibration modes of NH4+ in different surrounding conditions. The internal force constants have been determined and compared to their values in ammonium halides and in the free ion, Their trends have been discussed in terms of the hydrogen bonding and volume effects. The intraionic polarizability parameters have also been obtained and compared to those of CH4. |
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