Rare Earth-rich Magnesium Compounds RE4RhMg (1{RE} = Y, La - Nd, Sm, Gd - Tm, Lu)
| 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 | RODEWALD, Ute Ch. | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | CHEVALIER, Bernard | |
| hal.structure.identifier | Institut für Anorganische und Analytische Chemie | |
| dc.contributor.author | PÖTTGEN, Rainer | |
| dc.date.issued | 2007 | |
| dc.identifier.issn | 0932-0776 | |
| dc.description.abstractEn | The series of magnesium compounds RE4 RhMg (RE = Y, La–Nd, Sm, Gd–Tm, Lu) was prepared by high-frequency melting of the elements in sealed tantalum tubes. All samples were investigated by powder X-ray diffraction. The structures with RE = Sm, Gd, Dy, Ho, and Er as rare earth metal components were refined from single crystal diffractometer data: Gd4 RhIn-type, F ¯43m, Z = 16, a = 1392.1(1) pm, wR2 = 0.060, 616 F2 values, 19 variables for Sm 4 RhMg, a = 1380.8(2) pm, wR2 = 0.071, 530 F2 values, 19 variables for Gd4 RhMg, a = 1366.9(1) pm, wR2 = 0.070, 594 F2 values, 20 variables for Dy4 RhMg, a = 1355.7(2) pm, wR2 = 0.077, 578 F2 values, 20 variables for Ho3.52 RhMg1.48 , and a = 1355.4(2) pm, wR2 = 0.075, 559 F2 values, 20 variables for Er 3.94 RhMg1.06 . The rhodium atoms have slightly distorted trigonal prismatic rare earth coordination. Condensation of the RhRE6 prisms leads to a three-dimensional network which leaves large voids that are filled by regular Mg4 tetrahedra with a Mg–Mg distance of 312 pm in Sm4 RhMg.The magnesium atoms have twelve nearest neighbors (3 Mg + 9 RE) in icosahedral coordination. In the structures with holmium and erbium, the RE1 positions which are not involved in the trigonal prismatic network exhibit RE1/Mg mixing. Shortest distances occur for Sm–Rh (286 pm) within the rigid three-dimensional network of condensed trigonal prisms | |
| dc.language.iso | en | |
| dc.publisher | Verlag der Zeitschrift Fuer Naturforschung | |
| dc.subject.en | Magnesium | |
| dc.subject.en | Intermetallics | |
| dc.subject.en | Crystal Chemistry | |
| dc.title.en | Rare Earth-rich Magnesium Compounds RE4RhMg (1{RE} = Y, La - Nd, Sm, Gd - Tm, Lu) | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1515/znb-2007-0503 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Zeitschrift fur Naturforschung B | |
| bordeaux.page | 642-646 | |
| bordeaux.volume | 62 | |
| bordeaux.issue | 5 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00142632 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00142632v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Zeitschrift%20fur%20Naturforschung%20B&rft.date=2007&rft.volume=62&rft.issue=5&rft.spage=642-646&rft.epage=642-646&rft.eissn=0932-0776&rft.issn=0932-0776&rft.au=TUNCEL,%20Selcan&RODEWALD,%20Ute%20Ch.&CHEVALIER,%20Bernard&P%C3%96TTGEN,%20Rainer&rft.genre=article |
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