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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...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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International Union of Crystallography
2012
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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. |
format | Online Article Text |
id | pubmed-3393142 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | International Union of Crystallography |
record_format | MEDLINE/PubMed |
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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