Serveur d'exploration sur le nickel au Maghreb

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Dilithium disodium nickel(II) cyclo­hexa­phosphate dodeca­hydrate, Li2Na2NiP6O18·12H2O

Identifieur interne : 000210 ( Main/Exploration ); précédent : 000209; suivant : 000211

Dilithium disodium nickel(II) cyclo­hexa­phosphate dodeca­hydrate, Li2Na2NiP6O18·12H2O

Auteurs : Sonia Abid [Tunisie] ; Salem S. Al-Deyab [Arabie saoudite] ; Mohamed Rzaigui [Tunisie]

Source :

RBID : PMC:3414093

Abstract

The crystal structure of Li2Na2NiP6O18·12H2O is characterized by the presence of six-membered P6O186− phosphate ring anions (inter­nal symmetry -1) having a chair conformation and three different cations, viz. Li+, Na+ and Ni2+, to counterbalance the anionic charge. All atoms are in general positions except for nickel, which lies on a special position with site symmetry 2. Lithium has a tetra­hedral environment (LiO4), and sodium and nickel have octa­hedral environments [NaO6 and Ni(H2O)6, respectively]. The P6O18 rings are linked via corner sharing by NaO6 octa­hedra and LiO4 tetra­hedra to form a three-dimensional framework presenting tunnels running along [010] in which the six-coordinated Ni2+ cations are located. The structure is stabilized by a network of O—H⋯O hydrogen bonds.


Url:
DOI: 10.1107/S1600536812029960
PubMed: 22904700
PubMed Central: 3414093


Affiliations:


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<sub>2</sub>
Na
<sub>2</sub>
NiP
<sub>6</sub>
O
<sub>18</sub>
·12H
<sub>2</sub>
O</title>
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<name sortKey="Abid, Sonia" sort="Abid, Sonia" uniqKey="Abid S" first="Sonia" last="Abid">Sonia Abid</name>
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<title xml:lang="en" level="a" type="main">Dilithium disodium nickel(II) cyclo­hexa­phosphate dodeca­hydrate, Li
<sub>2</sub>
Na
<sub>2</sub>
NiP
<sub>6</sub>
O
<sub>18</sub>
·12H
<sub>2</sub>
O</title>
<author>
<name sortKey="Abid, Sonia" sort="Abid, Sonia" uniqKey="Abid S" first="Sonia" last="Abid">Sonia Abid</name>
<affiliation wicri:level="1">
<nlm:aff id="a">Laboratoire de Chimie des Matériaux, Faculté des Sciences de Bizerte, 7021 Zarzouna Bizerte,
<country>Tunisia</country>
</nlm:aff>
<country xml:lang="fr">Tunisie</country>
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</affiliation>
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<author>
<name sortKey="Al Deyab, Salem S" sort="Al Deyab, Salem S" uniqKey="Al Deyab S" first="Salem S." last="Al-Deyab">Salem S. Al-Deyab</name>
<affiliation wicri:level="1">
<nlm:aff id="b">Petrochemical Research Chair, College of Science, King Saud University, Riyadh,
<country>Saudi Arabia</country>
</nlm:aff>
<country xml:lang="fr">Arabie saoudite</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author>
<name sortKey="Rzaigui, Mohamed" sort="Rzaigui, Mohamed" uniqKey="Rzaigui M" first="Mohamed" last="Rzaigui">Mohamed Rzaigui</name>
<affiliation wicri:level="1">
<nlm:aff id="a">Laboratoire de Chimie des Matériaux, Faculté des Sciences de Bizerte, 7021 Zarzouna Bizerte,
<country>Tunisia</country>
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<country xml:lang="fr">Tunisie</country>
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<title level="j">Acta Crystallographica Section E: Structure Reports Online</title>
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<p>The crystal structure of Li
<sub>2</sub>
Na
<sub>2</sub>
NiP
<sub>6</sub>
O
<sub>18</sub>
·12H
<sub>2</sub>
O is characterized by the presence of six-membered P
<sub>6</sub>
O
<sub>18</sub>
<sup>6−</sup>
phosphate ring anions (inter­nal symmetry -1) having a chair conformation and three different cations,
<italic>viz.</italic>
Li
<sup>+</sup>
, Na
<sup>+</sup>
and Ni
<sup>2+</sup>
, to counterbalance the anionic charge. All atoms are in general positions except for nickel, which lies on a special position with site symmetry 2. Lithium has a tetra­hedral environment (LiO
<sub>4</sub>
), and sodium and nickel have octa­hedral environments [NaO
<sub>6</sub>
and Ni(H
<sub>2</sub>
O)
<sub>6</sub>
, respectively]. The P
<sub>6</sub>
O
<sub>18</sub>
rings are linked
<italic>via</italic>
corner sharing by NaO
<sub>6</sub>
octa­hedra and LiO
<sub>4</sub>
tetra­hedra to form a three-dimensional framework presenting tunnels running along [010] in which the six-coordinated Ni
<sup>2+</sup>
cations are located. The structure is stabilized by a network of O—H⋯O hydrogen bonds.</p>
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