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Na(3)Co(2)(AsO(4))(As(2)O(7)): a new sodium cobalt arsenate

In the title compound, tris­odium dicobalt arsenate diarsenate, Na(3)Co(2)AsO(4)As(2)O(7), the two Co atoms, one of the two As and three of the seven O atoms lie on special positions, with site symmetries 2 and m for the Co, m for the As, and 2 and twice m for the O atoms. The two Na atoms are disor...

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Autores principales: Guesmi, Abderrahmen, Driss, Ahmed
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3393142/
https://www.ncbi.nlm.nih.gov/pubmed/22807699
http://dx.doi.org/10.1107/S1600536812027791
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author Guesmi, Abderrahmen
Driss, Ahmed
author_facet Guesmi, Abderrahmen
Driss, Ahmed
author_sort Guesmi, Abderrahmen
collection PubMed
description In the title compound, tris­odium dicobalt arsenate diarsenate, Na(3)Co(2)AsO(4)As(2)O(7), the two Co atoms, one of the two As and three of the seven O atoms lie on special positions, with site symmetries 2 and m for the Co, m for the As, and 2 and twice m for the O atoms. The two Na atoms are disordered over two general and special positions [occupancies 0.72 (3):0.28 (3) and 0.940 (6):0.060 (6), respectively]. The main structural feature is the association of the CoO(6) octa­hedra in the ab plane, forming Co(4)O(20) units, which are corner- and edge-connected via AsO(4) and As(2)O(7) arsenate groups, giving rise to a complex polyhedral connectivity with small tunnels, such as those running along the b- and c-axis directions, in which the Na(+) ions reside. The structural model is validated by both bond-valence-sum and charge-distribution methods, and the distortion of the coordination polyhedra is analyzed by means of the effective coordination number.
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spelling pubmed-33931422012-07-17 Na(3)Co(2)(AsO(4))(As(2)O(7)): a new sodium cobalt arsenate Guesmi, Abderrahmen Driss, Ahmed Acta Crystallogr Sect E Struct Rep Online Inorganic Papers In the title compound, tris­odium dicobalt arsenate diarsenate, Na(3)Co(2)AsO(4)As(2)O(7), the two Co atoms, one of the two As and three of the seven O atoms lie on special positions, with site symmetries 2 and m for the Co, m for the As, and 2 and twice m for the O atoms. The two Na atoms are disordered over two general and special positions [occupancies 0.72 (3):0.28 (3) and 0.940 (6):0.060 (6), respectively]. The main structural feature is the association of the CoO(6) octa­hedra in the ab plane, forming Co(4)O(20) units, which are corner- and edge-connected via AsO(4) and As(2)O(7) arsenate groups, giving rise to a complex polyhedral connectivity with small tunnels, such as those running along the b- and c-axis directions, in which the Na(+) ions reside. The structural model is validated by both bond-valence-sum and charge-distribution methods, and the distortion of the coordination polyhedra is analyzed by means of the effective coordination number. International Union of Crystallography 2012-06-27 /pmc/articles/PMC3393142/ /pubmed/22807699 http://dx.doi.org/10.1107/S1600536812027791 Text en © Guesmi and Driss 2012 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 Inorganic Papers
Guesmi, Abderrahmen
Driss, Ahmed
Na(3)Co(2)(AsO(4))(As(2)O(7)): a new sodium cobalt arsenate
title Na(3)Co(2)(AsO(4))(As(2)O(7)): a new sodium cobalt arsenate
title_full Na(3)Co(2)(AsO(4))(As(2)O(7)): a new sodium cobalt arsenate
title_fullStr Na(3)Co(2)(AsO(4))(As(2)O(7)): a new sodium cobalt arsenate
title_full_unstemmed Na(3)Co(2)(AsO(4))(As(2)O(7)): a new sodium cobalt arsenate
title_short Na(3)Co(2)(AsO(4))(As(2)O(7)): a new sodium cobalt arsenate
title_sort na(3)co(2)(aso(4))(as(2)o(7)): a new sodium cobalt arsenate
topic Inorganic Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3393142/
https://www.ncbi.nlm.nih.gov/pubmed/22807699
http://dx.doi.org/10.1107/S1600536812027791
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