Syntheses and crystal structures of new vanadium(IV) oxyphosphates M(VO)<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub> with M = Co, Ni
| hal.structure.identifier | Laboratoire de Physico-Chimie des Matériaux Inorganiques | |
| dc.contributor.author | KAOUA, S. | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GRAVEREAU, Pierre | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | CHAMINADE, Jean-Pierre | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | PECHEV, Stanislav | |
| hal.structure.identifier | Laboratoire de Physico-Chimie des Matériaux Inorganiques | |
| dc.contributor.author | KRIMI, S. | |
| hal.structure.identifier | Laboratoire de Chimie des Matériaux Solides | |
| dc.contributor.author | EL JAZOULI, Abdelaziz | |
| dc.date.issued | 2009 | |
| dc.identifier.issn | 1293-2558 | |
| dc.description.abstractEn | We have extended our research interest on titanium oxyphosphates (M<sup>II</sup>(TiO)<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>, with M<sup>II</sup> = Mg, Fe, Co, Ni, Cu, Zn) to vanadium oxyphosphates M<sup>II</sup>(V<sup>IV</sup>O)<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub> (M<sup>II</sup> = Co, Ni). For each compound two phases, named α and β according to synthesis conditions, have been stabilized at room temperature, then characterized. The four crystal structures M(VO)<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub> (α and β for M = Co, Ni) have been determined in monoclinic <i>P</i>2<sub>1</sub>/<i>c</i> space group using X-ray single crystals diffraction data. Structure of the α phase is derived from the Li(TiO)(PO<sub>4</sub>) (orthorhombic <i>Pnma</i>) and LiNi<sub>0.50</sub>(TiO)<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub> (monoclinic <i>P</i>2<sub>1</sub>/<i>c</i>) types, with cell parameters: <i>a</i> = 6.310(1) Å, <i>b</i> = 7.273(1) Å, <i>c</i> = 7.432(1) Å, <i>β</i> = 90.43(1)° for M = Co, and <i>a</i> = 6.297(2) Å, <i>b</i> = 7.230(2) Å, <i>c</i> = 7.421(2) Å, <i>β</i> = 90.36(2)° for M = Ni. Structure of the β phase is derived from the Ni(TiO)<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>-type (monoclinic <i>P</i>2<sub>1</sub>/<i>c</i>) with cell parameters: <i>a</i> = 7.2742(2) Å, <i>b</i> = 7.2802(2) Å, <i>c</i> = 7.4550(2) Å, <i>β</i> = 120.171(2)° for M = Co, and <i>a</i> = 7.2691(2) Å, <i>b</i> = 7.2366(2) Å, <i>c</i> = 7.4453(2) Å, <i>β</i> = 120.231(2)° for M = Ni. All these structures consist of a three dimensional (3D) framework built up of infinite chains of tilted corner-sharing [VO<sub>6</sub>] octahedra, cross-linked by corner-sharing [PO<sub>4</sub>] tetrahedra. The M<sup>2+</sup> ion (M = Co, Ni) is located in a triangular based antiprism which shares faces with two [VO<sub>6</sub>] octahedra. Structural filiation is discussed based on a common structural unit, a sheet where divalent cations M<sup>2+</sup> (M = Co, Ni) are inserted. A thermal study of the α ↔ β transition is also presented. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Co(VO)<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub> | |
| dc.subject.en | Ni(VO)<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub> | |
| dc.subject.en | Vanadium(IV) oxyphosphate compound | |
| dc.subject.en | Single crystal and powder X-ray diffraction | |
| dc.title.en | Syntheses and crystal structures of new vanadium(IV) oxyphosphates M(VO)<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub> with M = Co, Ni | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.solidstatesciences.2008.11.011 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Solid State Sciences | |
| bordeaux.page | 628-634 | |
| bordeaux.volume | 11 | |
| bordeaux.issue | 3 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00367469 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00367469v1 | |
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