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Structural modifications of dodecatungstophosphoric acid hexahydrate induced by temperature in the 10–358 K range. In situ high-resolution neutron powder diffraction investigation

Abstract : Dodecatungstophosphoric acid hexahydrate H3PW12O40·6H2O crystal structure has been investigated by neutron powder diffraction (NPD) at different temperatures in the 10–358 K range. A nonconvergent reversible phase transition has been noticed at about 320 K. This transition is associated with a change in dynamic equilibrium of hydrate species and partial reduction/oxidation (redox) W6+↔W5+. Expressive structure changes lie in the PO bonding inside Keggin's anion and the H5O2+ conformational angle.
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https://hal-centralesupelec.archives-ouvertes.fr/hal-02298723
Contributor : Amandine Lustrement <>
Submitted on : Friday, September 27, 2019 - 10:25:41 AM
Last modification on : Wednesday, July 1, 2020 - 4:22:03 PM

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A. Kremenovic, Anne Spasojevic - de Biré, F. Bouree, Ph. Colomban, R. Dimitrijević, et al.. Structural modifications of dodecatungstophosphoric acid hexahydrate induced by temperature in the 10–358 K range. In situ high-resolution neutron powder diffraction investigation. Solid State Ionics, Elsevier, 2002, 150 (3-4), pp.431-442. ⟨10.1016/S0167-2738(02)00419-8⟩. ⟨hal-02298723⟩

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