Synthesis and structural characterization of RE6Cd23T (RE=La–Gd; T=Sn, Sb, Pb, and Bi)

Abstract

Synthetic methods and structural characterization are reported for 11 novel ternary compounds with the general formula RE 6 Cd 23 T (RE = La-Gd; T = Sn, Sb, Pb, and Bi). Their crystal structures, as revealed by single-crystal and powder X-ray diffraction, are of the cubic Zr 6 Zn 23 Si structure type (cF120, Fm  3m, Z = 4), a filled version of the Th 6 Mn 23 system. No Cdcontaining rare-earth metal binaries are known to form with this structure, but the inclusion of small amounts of a third element allows the formation of the interstitially stabilized ternary structures. Temperature dependent dc magnetization measurements confirm local-moment magnetism due to RE 3+ ground states for Ce, Pr, and Nd.

Synthesis and structure determination of Ce6Cd23Te: a new chalcogen-containing member of theRE6Cd23T family (REis a rare-earth metal and T is a late group 14, 15 and 16 element)

“…As was the case with our previous RE 6 Cd 23 T work (Desroches & Bobev, 2017), the experimental diffraction pattern was easily indexed and the intensities matched up well with the simulations generated from the subsequent single-crystal work. The data were used for phaseidentification only.…”

“…It should be noted that in our previous RE 6 Cd 23 T study (Desroches & Bobev, 2017) we observed that the identity of the interstitial atom T had a considerable effect on the phase purity. Specifically, it was found that heavy-atom interstitials gave better yields than their lighter counterparts.…”

“…In addition to our previous report on the RE 6 Cd 23 T series of compounds, with RE being La-Nd, Sm, and Gd, and T being Sn, Pb, Sb, and Bi (Desroches & Bobev, 2017), the crystal ISSN 2053ISSN -2296 # 2017 International Union of Crystallography chemistry of the Mg-based RE 6 Mg 23 T counterparts has also been established (Wrubl et al, 2016), in addition to that of La 6 Mg 23 Si and Er 6 Zn 23 Ge (De Negri et al, 2009;Solohka et al, 2016). In addition to our previous report on the RE 6 Cd 23 T series of compounds, with RE being La-Nd, Sm, and Gd, and T being Sn, Pb, Sb, and Bi (Desroches & Bobev, 2017), the crystal ISSN 2053ISSN -2296 # 2017 International Union of Crystallography chemistry of the Mg-based RE 6 Mg 23 T counterparts has also been established (Wrubl et al, 2016), in addition to that of La 6 Mg 23 Si and Er 6 Zn 23 Ge (De Negri et al, 2009;Solohka et al, 2016).…”

“…Powder X-ray diffraction (PXRD) revealed that the phase purity was equal to or even better than that of Ce 6 Cd 23 Bi (Desroches & Bobev, 2017). Powder X-ray diffraction (PXRD) revealed that the phase purity was equal to or even better than that of Ce 6 Cd 23 Bi (Desroches & Bobev, 2017).…”

“…The title compound was identified from follow-up work on the RE 2 Zn 5 T (Suen & Bovev, 2013) and the RE 6 Cd 23 T series of compounds (Desroches & Bobev, 2017), and so the same heating profile was used here. The title compound was identified from follow-up work on the RE 2 Zn 5 T (Suen & Bovev, 2013) and the RE 6 Cd 23 T series of compounds (Desroches & Bobev, 2017), and so the same heating profile was used here.…”