Sodium pentapotassium pentanickel tetra(diphosphate), NaK5Ni5(P2O7)4
Identifieur interne : 000208 ( Main/Exploration ); précédent : 000207; suivant : 000209Sodium pentapotassium pentanickel tetra(diphosphate), NaK5Ni5(P2O7)4
Auteurs : Meryem Moutataouia [Maroc] ; Mohammed Lamire [Maroc] ; Mohamed Saadi [Maroc] ; Lahcen El Ammari [Maroc]Source :
- Acta Crystallographica Section E: Structure Reports Online [ 1600-5368 ] ; 2012.
Abstract
The structure of the title compound, NaK5Ni5(P2O7)4, is characterized by the presence of two crystallographically independent P2O7 groups with different conformations. The conformation of the first P2O7 group is eclipsed, whereas that of the second is staggered. All atoms are in general positions except for two nickel and one potassium ions which lie on symmetry centers. Moreover, the structure exhibits disorder of the cationic sites with one general position fully occupied equally by Na+ and Ni2+ cations. This mixed site is surrounded by five O atoms forming a square-based pyramid. The crystal structure consists of edge-sharing [NiO6] octahedra forming infinite zigzag chains [Ni3O14] running parallel to [100]. Adjacent chains are connected through apices to P2O7 groups and to another [NiO6] or to a [KO6] octahedron. The resulting three-dimensional framework presents intersecting tunnels running along the [010] and [001] directions in which the seven- and nine-coordinated potassium cations are located. The crystal structure of this new phosphate represents a new structural type.
Url:
DOI: 10.1107/S160053681202017X
PubMed: 22719274
PubMed Central: 3379053
Affiliations:
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wicri:level="1"><nlm:aff id="a">Laboratoire de Physico-Chimie des Matériaux Inorganiques, Faculté des Sciences Aïn Chock, Casablanca,<country>Morocco</country></nlm:aff><country xml:lang="fr">Maroc</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Saadi, Mohamed" sort="Saadi, Mohamed" uniqKey="Saadi M" first="Mohamed" last="Saadi">Mohamed Saadi</name><affiliation wicri:level="1"><nlm:aff id="b">Laboratoire de Chimie du Solide Appliquée, Faculté des Sciences, Université Mohammed V-Agdal, Avenue Ibn Batouta, BP 1014, Rabat,<country>Morocco</country></nlm:aff><country xml:lang="fr">Maroc</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="El Ammari, Lahcen" sort="El Ammari, Lahcen" uniqKey="El Ammari L" first="Lahcen" last="El Ammari">Lahcen El Ammari</name><affiliation wicri:level="1"><nlm:aff id="b">Laboratoire de Chimie du Solide Appliquée, Faculté des Sciences, Université Mohammed V-Agdal, Avenue Ibn Batouta, BP 1014, Rabat,<country>Morocco</country></nlm:aff><country xml:lang="fr">Maroc</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author></analytic><series><title level="j">Acta Crystallographica Section E: Structure Reports Online</title><idno type="eISSN">1600-5368</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>The structure of the title compound, NaK<sub>5</sub>Ni<sub>5</sub>(P<sub>2</sub>O<sub>7</sub>)<sub>4</sub>, is characterized by the presence of two crystallographically independent P<sub>2</sub>O<sub>7</sub> groups with different conformations. The conformation of the first P<sub>2</sub>O<sub>7</sub> group is eclipsed, whereas that of the second is staggered. All atoms are in general positions except for two nickel and one potassium ions which lie on symmetry centers. Moreover, the structure exhibits disorder of the cationic sites with one general position fully occupied equally by Na<sup>+</sup> and Ni<sup>2+</sup> cations. This mixed site is surrounded by five O atoms forming a square-based pyramid. The crystal structure consists of edge-sharing [NiO<sub>6</sub>] octahedra forming infinite zigzag chains [Ni<sub>3</sub>O<sub>14</sub>] running parallel to [100]. Adjacent chains are connected through apices to P<sub>2</sub>O<sub>7</sub> groups and to another [NiO<sub>6</sub>] or to a [KO<sub>6</sub>] octahedron. The resulting three-dimensional framework presents intersecting tunnels running along the [010] and [001] directions in which the seven- and nine-coordinated potassium cations are located. The crystal structure of this new phosphate represents a new structural type.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct></listBibl></div1></back></TEI><affiliations><list><country><li>Maroc</li></country></list><tree><country name="Maroc"><noRegion><name sortKey="Moutataouia, Meryem" sort="Moutataouia, Meryem" uniqKey="Moutataouia M" first="Meryem" last="Moutataouia">Meryem Moutataouia</name></noRegion><name sortKey="El Ammari, Lahcen" sort="El Ammari, Lahcen" uniqKey="El Ammari L" first="Lahcen" last="El Ammari">Lahcen El Ammari</name><name sortKey="Lamire, Mohammed" sort="Lamire, Mohammed" uniqKey="Lamire M" first="Mohammed" last="Lamire">Mohammed Lamire</name><name sortKey="Saadi, Mohamed" sort="Saadi, Mohamed" uniqKey="Saadi M" first="Mohamed" last="Saadi">Mohamed Saadi</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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