The stannides RE
3Au6Sn5 (RE = La, Ce, Pr, Nd, Sm) – synthesis, structure, magnetic properties and 119Sn Mössbauer spectroscopy
Author:
Fickenscher Thomas1, Rodewald Ute Ch.1, Niehaus Oliver1, Gerke Birgit1, Haverkamp Sandra2, Eckert Hellmut2, Pöttgen Rainer1
Affiliation:
1. Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, 48149 Münster, Germany 2. Institut für Physikalische Chemie, Universität Münster, Corrensstrasse 30, 48149 Münster, Germany
Abstract
Abstract
The Ce3Pd6Sb5-type rare earth stannides RE
3Au6Sn5 (RE
= La, Ce, Pr, Nd, Sm) were synthesized by arc-melting of the elements and subsequent annealing in open tantalum crucibles within sealed evacuated silica ampoules. The polycrystalline samples were studied by powder X-ray diffraction. The structures of three crystals were refined from single crystal X-ray diffractometer data: Pmmn, a
= 1360.3(9), b
= 455.9(2), c
= 1023.6(4) pm, wR2 = 0.0275, 1069 F
2 values, 48 variables for Ce3Au6Sn5, a
= 1352.4(4), b
= 455.1(1), c
= 1023.7(3) pm, wR2 = 0.0367, 1160 F
2 values, 48 variables for Nd3Au6Sn5, and a
= 1339.8(2), b
= 452.80(7), c
= 1012.4(2) pm, wR2 = 0.1204, 1040 F
2 values, 49 variables for Sm3Au5.59(2)Sn5.41(2). One of the gold sites of the samarium compound shows a significant degree of Au/Sn mixing. The RE
3Au6Sn5 structures are composed of three-dimensional [Au6Sn5] polyanionic networks with the two crystallographically independent rare earth atoms in larger cages, i.e., RE1@Au10Sn6 and RE2@Au8Sn8. The [Au6Sn5] network is stabilized by Au–Sn (266–320 pm), Au–Au (284–301 pm) as well as Sn–Sn (320 pm; distances given for the cerium compound) interactions. Temperature-dependent magnetic susceptibility measurements reveal an antiferromagnetic ordering only for Sm3Au6Sn5, while the other compounds exhibit Curie–Weiss paramagnetism. 119Sn Mössbauer spectroscopy shows resonances in the typical range for intermetallic tin compounds where tin takes part in the polyanionic network [isomer shifts between 1.73(1) and 2.28(1) mm·s−1]. With the help of theoretical electric field gradient calculations using the WIEN2k code it was possible to resolve the spectroscopic contributions of all three crystallographically independent atomic tin sites in the 119Sn spectra of RE
3Au6Sn5 (RE
= La, Ce, Pr, Nd, Sm).
Publisher
Walter de Gruyter GmbH
Subject
General Chemistry
Reference46 articles.
1. G. Just, P. Paufler, J. Alloys Compd. 1996, 232, 1. 2. P. Villars, K. Cenzual, Pearson’s Crystal Data: Crystal Structure Database for Inorganic Compounds (release 2013/14), ASM International®, Materials Park, Ohio (USA) 2013. 3. A. Szytuła, J. Leciejewicz, Handbook of Crystal Structures and Magnetic Properties of Rare Earth Intermetallics, CRC Press, Boca Raton, Florida, 1994. 4. R. V. Skolozdra, in Handbook on the Physics and Chemistry of Rare Earths, (Eds.: K. A. Gschneidner Jr., L. Eyring), Vol. 24, Elsevier Science, Amsterdam, 1997, chapter 164, p. 399. 5. G. Cordier, E. Czech, H. Schäfer, P. Woll, J. Less-Common Met. 1985, 110, 327.
Cited by
8 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
1. From simple to complex crystal chemistry in the RE–Au–Tt systems (RE = La, Ce, Pr, Nd; Tt = Ge, Pb);ACS Organic & Inorganic Au;2022-02-21 2. Tin‐rich Phases
RE
2
Au
3
Sn
6
with
RE
= La, Ce, Pr, Nd, Sm – Synthesis, Structure, Magnetic Properties, and
119
Sn Mössbauer Spectra;Zeitschrift für anorganische und allgemeine Chemie;2020-01-22 3. Polyanionic Gold–Tin Bonding and Crystal Structure Preference in REAu1.5Sn0.5 (RE = La, Ce, Pr, Nd);Inorganic Chemistry;2018-08-17 4. R14(Au, M)51 (R = Y, La–Nd, Sm–Tb, Ho, Er, Yb, Lu; M = Al, Ga, Ge, In, Sn, Sb, Bi): Stability Ranges and Site Preference in the Gd14Ag51 Structure Type;Crystal Growth & Design;2018-01-09 5. Bringing order to large-scale disordered complex metal alloys: Gd2Au15−xSbxand BaAuxGa12−x;CrystEngComm;2018
|
|