| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1505325 | Solid State Sciences | 2011 | 8 Pages |
The new antimonides RE8Rh17Sb14 (RE = La, Ce, Pr, Nd) were synthesised by arc-melting. Crystals can be grown in a high-frequency furnace. The RE8Rh17Sb14 phases were characterized by powder X-ray diffraction. They crystallize with a tetragonal, CaBe2Ge2-related superstructure which was refined for Ce8Rh17Sb14 on the basis of single crystal X-ray diffractometer data: I4cm, a = 1239.8 (3), c = 2101.8 (8) pm, wR = 0.065, 2924 F values, and 109 parameters. The rhodium and antimony atoms and vacancies show full ordering on the [Be2Ge2] substructure, leading to a composition of Ce8Rh17Sb14CeRh2.13Sb1.75. The superstructure formation is discussed on the basis of a group-subgroup scheme together with the related structures of CePt2+xSb2−y, CeNi1.91As1.94 and URh1.6As1.9. Temperature dependent susceptibility measurements show Pauli paramagnetism for La8Rh17Sb14 and Curie–Weiss paramagnetism for RE8Rh17Sb14 (RE = Ce, Pr, Nd). No magnetic ordering was detected down to 2.5 K.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Synthesis of new RE8Rh17Sb14 antimonides. ► Group-subgroup relation with the CaBe2Ge2 type in the Bärnighausen formalism. ► Superstructure formation through vacancy ordering.
