Na₃Co₂(AsO₄)(As₂O₇): a new sodium cobalt arsenate.
Identifieur interne : 000041 ( PubMed/Curation ); précédent : 000040; suivant : 000042Na₃Co₂(AsO₄)(As₂O₇): a new sodium cobalt arsenate.
Auteurs : Abderrahmen Guesmi [Tunisie] ; Ahmed DrissSource :
- Acta crystallographica. Section E, Structure reports online [ 1600-5368 ] ; 2012.
Abstract
In the title compound, tris-odium dicobalt arsenate diarsenate, Na₃Co₂AsO₄As₂O₇, 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 CoO₆ octa-hedra in the ab plane, forming Co₄O₂₀ units, which are corner- and edge-connected via AsO₄ and As₂O₇ 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.
DOI: 10.1107/S1600536812027791
PubMed: 22807699
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Section E, Structure reports online</title><idno type="eISSN">1600-5368</idno><imprint><date when="2012" type="published">2012</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In the title compound, tris-odium dicobalt arsenate diarsenate, Na₃Co₂AsO₄As₂O₇, 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 CoO₆ octa-hedra in the ab plane, forming Co₄O₂₀ units, which are corner- and edge-connected via AsO₄ and As₂O₇ 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.</div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">22807699</PMID><DateCreated><Year>2012</Year><Month>7</Month><Day>18</Day></DateCreated><DateCompleted><Year>2012</Year><Month>10</Month><Day>02</Day></DateCompleted><DateRevised><Year>2013</Year><Month>2</Month><Day>27</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1600-5368</ISSN><JournalIssue CitedMedium="Internet"><Volume>68</Volume><Issue>Pt 7</Issue><PubDate><Year>2012</Year><Month>Jul</Month><Day>1</Day></PubDate></JournalIssue><Title>Acta crystallographica. Section E, Structure reports online</Title><ISOAbbreviation>Acta Crystallogr Sect E Struct Rep Online</ISOAbbreviation></Journal><ArticleTitle>Na₃Co₂(AsO₄)(As₂O₇): a new sodium cobalt arsenate.</ArticleTitle><Pagination><MedlinePgn>i58</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1107/S1600536812027791</ELocationID><Abstract><AbstractText>In the title compound, tris-odium dicobalt arsenate diarsenate, Na₃Co₂AsO₄As₂O₇, 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 CoO₆ octa-hedra in the ab plane, forming Co₄O₂₀ units, which are corner- and edge-connected via AsO₄ and As₂O₇ 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.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Guesmi</LastName><ForeName>Abderrahmen</ForeName><Initials>A</Initials><AffiliationInfo><Affiliation>Laboratoire de Matériaux et Cristallochimie, Faculté des Sciences, El Manar II, 2092 Tunis, Tunisia. abderrahmen.guesmi@ipeim.rnu.tn</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Driss</LastName><ForeName>Ahmed</ForeName><Initials>A</Initials></Author></AuthorList><Language>ENG</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2012</Year><Month>Jun</Month><Day>27</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Acta Crystallogr Sect E Struct Rep Online</MedlineTA><NlmUniqueID>101089178</NlmUniqueID><ISSNLinking>1600-5368</ISSNLinking></MedlineJournalInfo><CommentsCorrectionsList><CommentsCorrections RefType="Cites"><RefSource>Acta Crystallogr C. 2002 Jan;58(Pt 1):i16-7</RefSource><PMID Version="1">11781450</PMID></CommentsCorrections></CommentsCorrectionsList><OtherID Source="NLM">PMC3393142</OtherID></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2012</Year><Month>5</Month><Day>28</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2012</Year><Month>6</Month><Day>19</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2012</Year><Month>7</Month><Day>19</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2012</Year><Month>7</Month><Day>19</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2012</Year><Month>7</Month><Day>19</Day><Hour>6</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">22807699</ArticleId><ArticleId IdType="doi">10.1107/S1600536812027791</ArticleId><ArticleId IdType="pii">jj2142</ArticleId><ArticleId IdType="pmc">PMC3393142</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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