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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...

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Autores principales: Ksiksi, Nesrine, Driss, Mohamed, Hellali, Dalila, Guesmi, Abderrahmen, Zamali, Hmida
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2015
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.
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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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