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Polarized Raman and powder IR spectra for a (NH4)4H3(SeO4)3 crystal were measured at room temperature and discussed with relation to the crystal structure. Additionally, the reflection polarized IR spectra were measured. The transition into a metastable phase was observed for the first heating DSC scan. In following cooling and heating scans 5 and 7 phase transitions, respectively, were observed. No changes were noticed between the IR spectra of the fresh sample and that which was heated up to a superionic phase and cooled down. A strong reaction between the KBr windows and the sample occurs when heating to the superionic phase.
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Tom
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355--367
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Bibliogr. 20 poz., tab., wykr.
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autor
autor
autor
- Institute of Low Temperature and Structure Research Polsh Academy of Science 2 Okólna street 50-950 Wrocław Poland
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Bibliografia
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bwmeta1.element.baztech-article-BAR2-0001-0034