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Disodium tris­(dioxidomolybdenum) bis­(diarsenate)

Identifieur interne : 000373 ( Main/Exploration ); précédent : 000372; suivant : 000374

Disodium tris­(dioxidomolybdenum) bis­(diarsenate)

Auteurs : Raja Jouini [Tunisie] ; Mohamed Faouzi Zid [Tunisie] ; Ahmed Driss [Tunisie]

Source :

RBID : PMC:3343776

Abstract

The asymmetric unit of the title compound, Na2(MoO2)3(As2O7)2, is composed of two cyclic MoAs2O11 units and an MoO6 corner-sharing octa­hedron. The anionic framework can be decomposed into two types of layers, viz. MoO2As2O7 and Mo2As2O14, which use mixed Mo—O—As and As—O—Mo bridges to achieve a new three-dimensional structure with two types of large channels in which the Na+ cations are located. Two O atoms are disordered and are located in two positions close to their initial positions with occupancy ratios of 0.612 (17):0.388 (17) and 0.703 (12):0.298 (12).


Url:
DOI: 10.1107/S1600536812010069
PubMed: 22589750
PubMed Central: 3343776


Affiliations:


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<p>The asymmetric unit of the title compound, Na
<sub>2</sub>
(MoO
<sub>2</sub>
)
<sub>3</sub>
(As
<sub>2</sub>
O
<sub>7</sub>
)
<sub>2</sub>
, is composed of two cyclic MoAs
<sub>2</sub>
O
<sub>11</sub>
units and an MoO
<sub>6</sub>
corner-sharing octa­hedron. The anionic framework can be decomposed into two types of layers,
<italic>viz.</italic>
MoO
<sub>2</sub>
As
<sub>2</sub>
O
<sub>7</sub>
and Mo
<sub>2</sub>
As
<sub>2</sub>
O
<sub>14</sub>
, which use mixed Mo—O—As and As—O—Mo bridges to achieve a new three-dimensional structure with two types of large channels in which the Na
<sup>+</sup>
cations are located. Two O atoms are disordered and are located in two positions close to their initial positions with occupancy ratios of 0.612 (17):0.388 (17) and 0.703 (12):0.298 (12).</p>
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