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Crystal structure of alluaudite-type Na4Co(MoO4)3

Identifieur interne : 000161 ( Main/Exploration ); précédent : 000160; suivant : 000162

Crystal structure of alluaudite-type Na4Co(MoO4)3

Auteurs : Rawia Nasri [Tunisie] ; Noura Fakhar Bourguiba [Tunisie] ; Mohamed Faouzi Zid [Tunisie] ; Ahmed Driss [Tunisie]

Source :

RBID : PMC:4186203

Abstract

The title compound, tetra­sodium cobalt(II) tris­[molyb­date(IV)], was prepared by solid-state reactions. The structure is isotypic with Na3In2(AsO4)3 and Na3In2(PO4)3. The main structural feature is the presence of infinite chains of edge-sharing X2O10 (X = Co/Na) dimers, which are linked by MoO4 tetra­hedra, forming a three-dimensional framework enclosing two types of hexa­gonal tunnels in which Na+ cations reside. In this alluaudite structure, Co and Na atoms are located at the same general site with occupancies of 0.503 (5) and 0.497 (6), respectively. The other three Na and one of the two Mo atoms lie on special positions (site symmetries 2, -1, 2 and 2, respectively). The structure is compared with similar structures and other members of alluaudite family.


Url:
DOI: 10.1107/S1600536814016729
PubMed: 25309171
PubMed Central: 4186203


Affiliations:


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<sub>4</sub>
Co(MoO
<sub>4</sub>
)
<sub>3</sub>
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<name sortKey="Nasri, Rawia" sort="Nasri, Rawia" uniqKey="Nasri R" first="Rawia" last="Nasri">Rawia Nasri</name>
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<nlm:aff id="a">Laboratoire de Matériaux et Cristallochimie, Faculté des Sciences de Tunis, Université de Tunis El Manar, 2092 El Manar Tunis,
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<p>The title compound, tetra­sodium cobalt(II) tris­[molyb­date(IV)], was prepared by solid-state reactions. The structure is isotypic with Na
<sub>3</sub>
In
<sub>2</sub>
(AsO
<sub>4</sub>
)
<sub>3</sub>
and Na
<sub>3</sub>
In
<sub>2</sub>
(PO
<sub>4</sub>
)
<sub>3</sub>
. The main structural feature is the presence of infinite chains of edge-sharing
<italic>X</italic>
<sub>2</sub>
O
<sub>10</sub>
(
<italic>X</italic>
= Co/Na) dimers, which are linked by MoO
<sub>4</sub>
tetra­hedra, forming a three-dimensional framework enclosing two types of hexa­gonal tunnels in which Na
<sup>+</sup>
cations reside. In this alluaudite structure, Co and Na atoms are located at the same general site with occupancies of 0.503 (5) and 0.497 (6), respectively. The other three Na and one of the two Mo atoms lie on special positions (site symmetries 2, -1, 2 and 2, respectively). The structure is compared with similar structures and other members of alluaudite family.</p>
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