Synthesis, crystal structure and optical investigation of the new phosphates: Na<sub>7</sub>Mg<sub>13</sub><i>Ln</i>(PO<sub>4</sub>)<sub>12</sub> (<i>Ln</i>=La, Eu)
| hal.structure.identifier | Matériaux Inorganiques | |
| dc.contributor.author | JERBI, Hasna | |
| 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 | GLORIEUX, Benoit | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DARRIET, Jacques | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GARCIA, Alain | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | JUBERA, Veronique | |
| hal.structure.identifier | Matériaux Inorganiques | |
| dc.contributor.author | BEN AMARA, Mongi | |
| dc.date.issued | 2010 | |
| dc.identifier.issn | 0022-4596 | |
| dc.description.abstractEn | Two new isostructural rare earth phosphates Na<sub>7</sub>Mg<sub>13</sub><i>Ln</i>(PO<sub>4</sub>)<sub>12</sub> (<i>Ln</i>=La, Eu) have been synthesized and investigated by X-ray diffraction and optical measurements. They crystallize in the orthorhombic system with the <i>Cmc</i>2<sub>1</sub> space group (<i>Z</i>=4). The crystal structure exhibits a new type of framework built up from <i>Ln</i>O<sub>8</sub> (<i>Ln</i>=La, Eu), <i>M</i>O<sub>6</sub> (<i>M</i>=0.5Mg+0.5Na) and MgO<i><sub>x</sub></i> (<i>x</i>=5, 6) polyhedra and PO<sub>4</sub> tetrahedra linked by common corner, edge or face. It can be described in terms of [Mg<sub>4</sub>MP<sub>4</sub>O<sub>22</sub>]<sub>∞</sub> layers stacked along the <i>a</i> direction. These layers are interconnected by [Mg<sub>4</sub><i>Ln</i>P<sub>4</sub>O<sub>36</sub>]<sub>∞</sub> undulating chains spreading along the <i>b</i> direction. This framework delimits 6 distinct cavities occupied by Na<sup>+</sup> cations. The results of the optical study of Na<sub>7</sub>Mg<sub>13</sub>La<sub>1−<i>x</i></sub>Eu<i><sub>x</sub></i>(PO<sub>4</sub>)<sub>12</sub> (<i>x</i>=0, 0.02, 0.1, 1) reveal the presence of two different Eu<sup>3+</sup> ion environments whereas the X-ray study predicts the existence of only one Eu site. This difference can be explained by the possible presence of the europium element in the sodium sites with small occupancies which cannot be detected by the X-ray structural determination. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Rare earth phosphates | |
| dc.subject.en | Chemical synthesis | |
| dc.subject.en | X-ray diffraction | |
| dc.subject.en | Optical properties | |
| dc.title.en | Synthesis, crystal structure and optical investigation of the new phosphates: Na<sub>7</sub>Mg<sub>13</sub><i>Ln</i>(PO<sub>4</sub>)<sub>12</sub> (<i>Ln</i>=La, Eu) | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.jssc.2010.05.010 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Journal of Solid State Chemistry | |
| bordeaux.page | 1752-1760 | |
| bordeaux.volume | 183 | |
| bordeaux.issue | 8 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00515588 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00515588v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Solid%20State%20Chemistry&rft.date=2010&rft.volume=183&rft.issue=8&rft.spage=1752-1760&rft.epage=1752-1760&rft.eissn=0022-4596&rft.issn=0022-4596&rft.au=JERBI,%20Hasna&HIDOURI,%20Mourad&GLORIEUX,%20Benoit&DARRIET,%20Jacques&GARCIA,%20Alain&rft.genre=article |
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