Isolation of the new cubic phases RE4FeGa12-xGex (RE = Sm, Tb; x=2.5) from molten gallium: Single-crystal neutron diffraction study of the Ga/Ge distribution
| dc.contributor.author | Zhuravleva, M. A. | en |
| dc.contributor.author | Wang, X. P. | en |
| dc.contributor.author | Schultz, A. J. | en |
| dc.contributor.author | Bakas, T. | en |
| dc.contributor.author | Kanatzidis, M. G. | en |
| dc.date.accessioned | 2015-11-24T18:26:38Z | |
| dc.date.available | 2015-11-24T18:26:38Z | |
| dc.identifier.issn | 0020-1669 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/15918 | |
| dc.rights | Default Licence | - |
| dc.subject | solid-state chemistry | en |
| dc.subject | exploratory synthesis | en |
| dc.subject | physical-properties | en |
| dc.subject | aluminum silicides | en |
| dc.subject | solvent | en |
| dc.subject | nd | en |
| dc.subject | chalcogenides | en |
| dc.subject | quaternary | en |
| dc.subject | uranium | en |
| dc.subject | growth | en |
| dc.title | Isolation of the new cubic phases RE4FeGa12-xGex (RE = Sm, Tb; x=2.5) from molten gallium: Single-crystal neutron diffraction study of the Ga/Ge distribution | en |
| heal.abstract | The compounds RE4FeGa12-xGex (RE = Sm, Tb) were discovered in reactions employing molten Ga as a solvent at 850 degreesC. However, the isostructural Y4FeGa12-xGex was prepared from a direct combination reaction. The crystal structure is cubic with space group Im (3) over barm, Z = 2, and a = 8.657(4) Angstrom and 8.5620(9) Angstrom for the Sm and Tb analogues, respectively. Structure refinement based on full-matrix least squares on F-0(2) resulted in R-1 = 1.47% and wR(2) = 4.13% [1 > 2sigma(1)] for RE = Sm and R-1 = 2.29% and wR(2) = 7.12% [1 > 2sigma(l)] for RE = Tb. The compounds crystallize in the U4Re7Si6 structure type, where the RE atoms are located on 8c (1/4, 1/4, 1/4) sites and the Fe atoms on 2a (0, 0, 0) sites. The distribution of Ga and Ge in the structure, investigated with single-crystal neutron diffraction on the Tb analogue, revealed that these atoms are disordered over the 12d (1/4, 0, 1/2) and 12e (x, 0, 0) sites. The amount of Ga/Ge occupying the 12d and 12e sites refined to 89(4)/11 and 70(4)/30%, respectively. Transport property measurements indicate that these compounds are metallic conductors. Magnetic susceptibility measurements and Mossbauer spectroscopy performed on the Tb analogue show a nonmagnetic state for Fe, while the Tb atoms carry a magnetic moment corresponding to a mu(eff) of 9.25 mu(B). | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.secondary | <Go to ISI>://000179184200022 | - |
| heal.identifier.secondary | http://pubs.acs.org/doi/pdfplus/10.1021/ic025544b | - |
| heal.journalName | Inorg Chem | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2002 | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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