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Le nitrate double NaRb(2)(NO(3))(3), composé intermédiaire du système binaire isobare NaNO(3) + RbNO(3): études thermiques et cristallographiques
Crystallographic and thermodynamic investigations of the binary (NaNO(3) + RbNO(3)) phase diagram at atmospheric pressure reveal the existence of an intermediate compound NaRb(2)(NO(3))(3) (sodium dirubidium trinitrate) previously predicted and now reported experimentally for the first time. Accord...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
International Union of Crystallography
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4420088/ https://www.ncbi.nlm.nih.gov/pubmed/25995854 http://dx.doi.org/10.1107/S2056989015006532 |
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author | Ksiksi, Nesrine Driss, Mohamed Hellali, Dalila Guesmi, Abderrahmen Zamali, Hmida |
author_facet | Ksiksi, Nesrine Driss, Mohamed Hellali, Dalila Guesmi, Abderrahmen Zamali, Hmida |
author_sort | Ksiksi, Nesrine |
collection | PubMed |
description | Crystallographic and thermodynamic investigations of the binary (NaNO(3) + RbNO(3)) phase diagram at atmospheric pressure reveal the existence of an intermediate compound NaRb(2)(NO(3))(3) (sodium dirubidium trinitrate) previously predicted and now reported experimentally for the first time. According to a DSC analysis, the compound exhibits three allotropic forms. In its low-temperature allotropic form (α form, orthorhombic) there are two Rb (m.. site symmetry) and one Na (m..) independent crystallographic positions and three planar nitrate groups. The bond-valence-sum calculations for all atoms agree well with their oxidation states. The Rb cations are located in the (100) plane at x = ½ with 11 oxygen coordination. The Na ones are in the same plane at x = 0 and are coordinated to eight O atoms from six nitrate groups. The charge-distribution method has been used to evaluate the degree of distortion of the alkali polyhedra. |
format | Online Article Text |
id | pubmed-4420088 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | International Union of Crystallography |
record_format | MEDLINE/PubMed |
spelling | pubmed-44200882015-05-20 Le nitrate double NaRb(2)(NO(3))(3), composé intermédiaire du système binaire isobare NaNO(3) + RbNO(3): études thermiques et cristallographiques Ksiksi, Nesrine Driss, Mohamed Hellali, Dalila Guesmi, Abderrahmen Zamali, Hmida Acta Crystallogr E Crystallogr Commun Research Communications Crystallographic and thermodynamic investigations of the binary (NaNO(3) + RbNO(3)) phase diagram at atmospheric pressure reveal the existence of an intermediate compound NaRb(2)(NO(3))(3) (sodium dirubidium trinitrate) previously predicted and now reported experimentally for the first time. According to a DSC analysis, the compound exhibits three allotropic forms. In its low-temperature allotropic form (α form, orthorhombic) there are two Rb (m.. site symmetry) and one Na (m..) independent crystallographic positions and three planar nitrate groups. The bond-valence-sum calculations for all atoms agree well with their oxidation states. The Rb cations are located in the (100) plane at x = ½ with 11 oxygen coordination. The Na ones are in the same plane at x = 0 and are coordinated to eight O atoms from six nitrate groups. The charge-distribution method has been used to evaluate the degree of distortion of the alkali polyhedra. International Union of Crystallography 2015-04-09 /pmc/articles/PMC4420088/ /pubmed/25995854 http://dx.doi.org/10.1107/S2056989015006532 Text en © Ksiksi et al. 2015 http://creativecommons.org/licenses/by/2.0/uk/ This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited. |
spellingShingle | Research Communications Ksiksi, Nesrine Driss, Mohamed Hellali, Dalila Guesmi, Abderrahmen Zamali, Hmida Le nitrate double NaRb(2)(NO(3))(3), composé intermédiaire du système binaire isobare NaNO(3) + RbNO(3): études thermiques et cristallographiques |
title | Le nitrate double NaRb(2)(NO(3))(3), composé intermédiaire du système binaire isobare NaNO(3) + RbNO(3): études thermiques et cristallographiques |
title_full | Le nitrate double NaRb(2)(NO(3))(3), composé intermédiaire du système binaire isobare NaNO(3) + RbNO(3): études thermiques et cristallographiques |
title_fullStr | Le nitrate double NaRb(2)(NO(3))(3), composé intermédiaire du système binaire isobare NaNO(3) + RbNO(3): études thermiques et cristallographiques |
title_full_unstemmed | Le nitrate double NaRb(2)(NO(3))(3), composé intermédiaire du système binaire isobare NaNO(3) + RbNO(3): études thermiques et cristallographiques |
title_short | Le nitrate double NaRb(2)(NO(3))(3), composé intermédiaire du système binaire isobare NaNO(3) + RbNO(3): études thermiques et cristallographiques |
title_sort | le nitrate double narb(2)(no(3))(3), composé intermédiaire du système binaire isobare nano(3) + rbno(3): études thermiques et cristallographiques |
topic | Research Communications |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4420088/ https://www.ncbi.nlm.nih.gov/pubmed/25995854 http://dx.doi.org/10.1107/S2056989015006532 |
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