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http://hdl.handle.net/2445/10637
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DC Field | Value | Language |
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dc.contributor.author | Solans, Xavier, 1949-2007 | cat |
dc.contributor.author | González-Silgo, Cristina | cat |
dc.contributor.author | Calvet Pallàs, Maria Teresa | cat |
dc.contributor.author | Ruiz-Pérez, C. | cat |
dc.contributor.author | Martínez Sarrión, María Luisa | cat |
dc.contributor.author | Mestres i Vila, Ma. Lourdes | cat |
dc.date.accessioned | 2009-12-29T11:01:23Z | - |
dc.date.available | 2009-12-29T11:01:23Z | - |
dc.date.issued | 1998 | cat |
dc.identifier.issn | 0163-1829 | cat |
dc.identifier.uri | http://hdl.handle.net/2445/10637 | - |
dc.description.abstract | Thermal analysis, powder diffraction, and Raman scattering as a function of the temperature were carried out on K2BeF4. Moreover, the crystal structure was determined at 293 K from powder diffraction. The compound shows a transition from Pna21 to Pnam space group at 921 K with a transition enthalpy of 5 kJ/mol. The transition is assumed to be first order because the compound shows metastability. Structurally and spectroscopically the transition is similar to those observed in (NH4)2SO4, which suggests that the low-temperature phase is ferroelectric. In order to confirm it, the spontaneous polarization has been computed using an ionic model. | eng |
dc.format.extent | 4 p. | cat |
dc.format.mimetype | application/pdf | eng |
dc.language.iso | eng | eng |
dc.publisher | The American Physical Society | cat |
dc.relation.isformatof | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.57.5122 | cat |
dc.relation.ispartof | Physical Review B, 1998, vol. 57, núm. 9, p. 5122-5125 | cat |
dc.relation.uri | http://dx.doi.org/10.1103/PhysRevB.57.5122 | - |
dc.rights | (c) The American Physical Society, 1998 | cat |
dc.source | Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada) | - |
dc.subject.classification | Difracció | cat |
dc.subject.classification | Ferroelectricitat | cat |
dc.subject.classification | Dielèctrics | cat |
dc.subject.other | Diffraction | eng |
dc.subject.other | Ferroelectricity | eng |
dc.subject.other | Dielectrics | eng |
dc.title | X-ray diffraction, thermal analysis, and Raman scattering study of K2BeF4 and comparation to other member of the (beta)-K2SO4 family with ferroelectric -paraelectric transition | eng |
dc.type | info:eu-repo/semantics/article | eng |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 118217 | cat |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada) Articles publicats en revistes (Química Inorgànica i Orgànica) |
Files in This Item:
File | Description | Size | Format | |
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118217.pdf | 84.61 kB | Adobe PDF | View/Open |
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