Structural study and properties of a new iron phosphate Rb<sub>9</sub>Fe<sub>7</sub>(PO<sub>4</sub>)<sub>10</sub>
| hal.structure.identifier | Matériaux Inorganiques | |
| dc.contributor.author | HIDOURI, Mourad | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | WATTIAUX, Alain | |
| hal.structure.identifier | Departamento de Química Inorgánica I | |
| dc.contributor.author | LOPEZ MARIA, Luisa | |
| hal.structure.identifier | Departamento de Química Inorgánica I | |
| dc.contributor.author | PICO, Carlos | |
| hal.structure.identifier | Matériaux Inorganiques | |
| dc.contributor.author | BEN AMARA, Mongi | |
| dc.date.issued | 2010 | |
| dc.identifier.issn | 0925-8388 | |
| dc.description.abstractEn | Synthesis, single crystal X-ray diffraction, Mössbauer and magnetic studies of a new iron phosphate Rb<sub>9</sub>Fe<sub>7</sub>(PO<sub>4</sub>)<sub>10</sub> are described. This compound crystallizes in the monoclinic system with the space group P2<sub>1</sub>/<i>a</i> and the following parameters: <i>a</i> = 9.886(4) Å, <i>b</i> = 16.493(2) Å, <i>c</i> = 13.437(2) Å, <i>β</i> = 110.49(3)° and <i>Z</i> = 2. Its structure is closely related to that of the Cs<sub>9−<i>x</i></sub>K<sub><i>x</i></sub>Fe<sub>7</sub>(PO<sub>4</sub>)<sub>10</sub> phosphates. The 3D framework consists of FeO<sub>6</sub> and FeO<sub>5</sub> polyhedra and Fe<sub>2</sub>O<sub>10</sub> units of corner-sharing FeO<sub>6</sub> and FeO<sub>5</sub> polyhedra. These units are linked to each other by the phosphate tetrahedra in such a way that the resulting framework forms large intersecting tunnels extending along the <i>a</i> and <i>c</i> directions, where the Rb<sup>+</sup> cations are located. A high temperature X-ray powder diffraction study showed a partial decomposition of the product above 773 K. The magnetic susceptibility results are consistent with Fe(III) showing an antiferromagnetic ordering below <i>T</i><sub>N</sub> ≈ 19 K and a paramagnetic behavior in the range of 50–300 K. The application of the Curie–Weiss law yields an effective moment of 5.99 μ<sub>B</sub> in a good agreement with the ideal spin only value of 5.92 μ<sub>B</sub> for d<sup>5</sup>-iron(III). The distribution of iron and its local environments were confirmed by a Mössbauer study undertaken at 293 and 4.2 K. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.title.en | Structural study and properties of a new iron phosphate Rb<sub>9</sub>Fe<sub>7</sub>(PO<sub>4</sub>)<sub>10</sub> | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.jallcom.2010.07.089 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Journal of Alloys and Compounds | |
| bordeaux.page | 569-574 | |
| bordeaux.volume | 506 | |
| bordeaux.issue | 2 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00530294 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00530294v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Alloys%20and%20Compounds&rft.date=2010&rft.volume=506&rft.issue=2&rft.spage=569-574&rft.epage=569-574&rft.eissn=0925-8388&rft.issn=0925-8388&rft.au=HIDOURI,%20Mourad&WATTIAUX,%20Alain&LOPEZ%20MARIA,%20Luisa&PICO,%20Carlos&BEN%20AMARA,%20Mongi&rft.genre=article |
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