Rare earth metal-rich magnesium compounds RE4IrMg (RE = Y, La, Pr, Nd, Sm, Gd, Tb, Dy) and RE23Ir7Mg4 (RE = La, Ce, Pr, Nd)
| hal.structure.identifier | Institut für Anorganische und Analytische Chemie | |
| dc.contributor.author | RODEWALD, Ute Ch. | |
| hal.structure.identifier | Institut für Anorganische und Analytische Chemie | |
| dc.contributor.author | TUNCEL, Selcan | |
| hal.structure.identifier | Institut für Anorganische und Analytische Chemie | |
| dc.contributor.author | PÖTTGEN, Rainer | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | CHEVALIER, Bernard | |
| dc.date.issued | 2008 | |
| dc.identifier.issn | 0044-2313 | |
| dc.description.abstractEn | The rare earth metal-rich compounds RE4IrMg (RE = Y, La, Pr, Nd, Sm, Gd, Tb, Dy) and RE23Ir7Mg4 (RE = La, Ce, Pr, Nd) were synthesized from the elements in sealed tantalum tubes in an induction furnace. Several structures were investigated on the basis of X-ray single crystal diffraction: P63mc, Z = 2, a = 1001.2(7), c = 2257.2(5) pm, wR2 = 0.0441, 2402 F2 values, 74 variables for Pr23Ir6.81Mg4, Gd4RhIn type, , Z = 16, a = 1438.3(2) pm, wR2 = 0.0490, 542 F2 values, for La4IrMg, a = 1405.6(2) pm, wR2 = 0.0368, 451 F2 values, for Nd4IrMg, a = 1381.2(2) pm, wR2 = 0.0541, 480 F2 values, for Gd4IrMg, a = 1370.7(2) pm, wR2 = 0.0377, 392 F2 values, for Tb4IrMg with 19 variables per refinement. All other compounds have been characterized by X-ray powder diffraction data. Pr23Ir6.81Mg4 crystallizes with a new structure type. The three crystallographically independent iridium atoms have trigonal prismatic praseodymium coordination with short Ir-Pr distances ranging from 285 to 300 pm. The trigonal prisms are condensed to a three-dimensional network via common edges and corners. Voids in the network are filled by the coordination polyhedra of the Pr4 and Pr6 atoms and Mg4 tetrahedra (312-317 pm Mg-Mg). Similar structural motifs occur in the compounds RE4IrMg, however, with a different connectivity of the building groups. The crystal chemistry of both structure types is comparatively discussed. | |
| dc.language.iso | en | |
| dc.publisher | Wiley-VCH Verlag | |
| dc.subject.en | Magnesium | |
| dc.subject.en | Intermetallics | |
| dc.subject.en | Crystal chemistry | |
| dc.title.en | Rare earth metal-rich magnesium compounds RE4IrMg (RE = Y, La, Pr, Nd, Sm, Gd, Tb, Dy) and RE23Ir7Mg4 (RE = La, Ce, Pr, Nd) | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1002/zaac.200700552 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Journal of Inorganic and General Chemistry / Zeitschrift für anorganische und allgemeine Chemie | |
| bordeaux.page | 1011-1016 | |
| bordeaux.volume | 634 | |
| bordeaux.issue | 6-7 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00278661 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00278661v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Inorganic%20and%20General%20Chemistry%20/%20Zeitschrift%20f%C3%BCr%20anorganische%20und%20allgemeine%20Chemie&rft.date=2008&rft.volume=634&rft.issue=6-7&rft.spage=1011-1016&rft.epage=1011-1016&rft.eissn=0044-2313&rft.issn=0044-2313&rft.au=RODEWALD,%20Ute%20Ch.&TUNCEL,%20Selcan&P%C3%96TTGEN,%20Rainer&CHEVALIER,%20Bernard&rft.genre=article |
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