Structural features of new rare earth-based mixed anions (O, S, F) compounds: relationships between optical absorption and rare earth environment
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | PAUWELS, Damien | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DEMOURGUES, Alain | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | LARONZE, Hervé | |
| 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 | GUILLEN, François | |
| hal.structure.identifier | Laboratoire de Cristallographie | |
| dc.contributor.author | ISNARD, Olivier | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | TRESSAUD, Alain | |
| dc.date.issued | 2002 | |
| dc.identifier.issn | 1293-2558 | |
| dc.description.abstractEn | In the structure of α-LnSF and Ln2AF4S2 (A=Ca, Sr) compounds which can be considered as formed of layer stacking, the rare earth and fluorine atoms form [Ln2F2]4+ or [Ln2AF4]4+ fluorite-type blocks which alternate with double [S2]4− layers along the c-axis. Then, it appears possible to modify the size of the fluorite-type block without any modification of its charge. In the case of rare earth oxyfluorosulfides, two new classes of compounds Ln3OF3S2 (Ln=La, Ce) and La2O1.5FS were identified. The structures of these compounds are related to α-LnSF and Ln2O2S networks. In these frameworks, the charge of the blocks containing the rare earth ions can be 2+ or 4+. These blocks alternate with single or double layers of sulfur atoms. The local geometry (number of neighbors, bond distances and angles) around the rare earth varies as a function of the number of the sulfur sheets. Absorption properties in UV-visible range are correlated with the structural features. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Electronic transitions | |
| dc.subject.en | UV-visible absorption | |
| dc.subject.en | Structure refinement | |
| dc.subject.en | Rare earth | |
| dc.subject.en | Fluorosulfides | |
| dc.subject.en | Oxyfluorosulfides | |
| dc.subject.en | Powder X-ray/neutron diffraction | |
| dc.title.en | Structural features of new rare earth-based mixed anions (O, S, F) compounds: relationships between optical absorption and rare earth environment | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/S1293-2558(02)00038-9 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Solid State Sciences | |
| bordeaux.page | 1471-1479 | |
| bordeaux.volume | 4 | |
| bordeaux.issue | 11-12 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00818787 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00818787v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Solid%20State%20Sciences&rft.date=2002&rft.volume=4&rft.issue=11-12&rft.spage=1471-1479&rft.epage=1471-1479&rft.eissn=1293-2558&rft.issn=1293-2558&rft.au=PAUWELS,%20Damien&DEMOURGUES,%20Alain&LARONZE,%20Herv%C3%A9&GRAVEREAU,%20Pierre&GUILLEN,%20Fran%C3%A7ois&rft.genre=article |
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