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Tetrapotassium disodium decavanadate(V) decahydrate.

P M Matias¹, J C Pessoa J, M T Duarte

¹Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Apartado 127, P-2780 Oeiras, Portugal.

Acta Crystallographica. Section C, Crystal Structure Communications

|July 21, 2004

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The decavanadate anion, [V(10)O(28)](6-), forms a new potassium-sodium salt hydrate. This compound shares the same structure as a previously identified disodium tetraammonium salt.

Area of Science:

Inorganic Chemistry
Crystallography
Materials Science

Background:

Decavanadate anions are complex polyoxometalates with diverse structures.
Isostructural relationships can provide insights into crystal packing and bonding.
The [V(10)O(28)](6-) anion is a well-known decavanadate species.

Purpose of the Study:

To synthesize and characterize a novel potassium-sodium decavanadate salt hydrate.
To investigate the crystallographic properties of the new compound.
To compare the structure of the title compound with known decavanadate salts.

Main Methods:

Single-crystal X-ray diffraction was used for structural determination.
Chemical synthesis methods were employed to obtain the title compound.

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Infrared spectroscopy was utilized for characterization.

Main Results:

The title compound, K(4)Na(2)[V(10)O(28)].10H(2)O, was successfully synthesized.
The crystal structure revealed that the compound is isostructural with the disodium tetraammonium salt.
The decavanadate anion [V(10)O(28)](6-) adopts a centrosymmetric structure in this salt.

Conclusions:

The formation of isostructural decavanadate salts highlights the versatility of the [V(10)O(28)](6-) anion.
The potassium-sodium salt provides further evidence for the stability and structural characteristics of this decavanadate species.
Understanding these structures aids in the design of novel polyoxometalate materials.