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Zeitschrift für Naturforschung B

A Journal of Chemical Sciences

IMPACT FACTOR 2018: 0.961

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Volume 73, Issue 11


Ternary indides RE3T2In4 (RE=Dy–Tm; T=Pd, Ir)

Sebastian Stein
  • Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, 48149 Münster, Germany
  • Other articles by this author:
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/ Lukas Heletta
  • Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, 48149 Münster, Germany
  • Other articles by this author:
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/ Rainer Pöttgen
  • Corresponding author
  • Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, 48149 Münster, Germany
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  • Other articles by this author:
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Published Online: 2018-07-04 | DOI: https://doi.org/10.1515/znb-2018-0091


The ternary rare earth transition metal-indides RE3T2In4 (RE=Dy–Tm; T=Pd, Ir) were obtained from high-temperature reactions in sealed niobium ampoules. These indides adopt a hexagonal structure of the Lu3Co1.87In4 type (space group P6̅), a ternary ordered superstructure of the aristotype Fe2P. The structures of three different compounds were refined from single-crystal X-ray diffractometer data: a=768.20(6), c=381.97(3) pm, 1441 F2 values, 24 parameters, wR2=0.0338 (Ho3Pd1.90In4); a=774.98(3), c=378.51(2) pm, 577 F2 values, 23 parameters, wR2=0.0742 (Ho3Ir1.69In4.31) and a=780.3(1), c=369.4(1) pm, 573 F2 values, 22 parameters, wR2=0.0403 (Tm3Ir1.51In4.49). Refinements of the occupancies revealed homogeneity ranges in case of the iridium-based crystals resulting from Ir/In mixing. The refined composition of the palladium compound was Ho3Pd1.90In4 resulting from defects on the Wyckoff position 1d, which was already reported for the prototype Lu3Co1.87In4. The geometrical motifs of the RE3T2In4 structures are three different types of tricapped trigonal prisms around the transition metal and indium atoms which are condensed via common edges and triangular faces. Temperature dependent magnetic susceptibility measurements of Dy3Ir2In4 and Tm3Ir2In4 showed Curie-Weiss behavior and the experimental magnetic moments of 10.59(2) μB (Dy3Ir2In4) and 7.40(2) μB (Tm3Ir2In4) confirming stable trivalent RE3+ states. Dy3Ir2In4 and Tm3Ir2In4 order antiferromagnetically with Néel temperatures of TN=13.6(5) and 5.4(5) K, respectively.

Keywords: crystal structure; indium intermetallics; magnetic properties; rare earth compounds

Dedicated to:

Professor Bernt Krebs on the occasion of his 80th birthday.


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About the article

Received: 2018-05-17

Accepted: 2018-06-23

Published Online: 2018-07-04

Published in Print: 2018-11-27

Citation Information: Zeitschrift für Naturforschung B, Volume 73, Issue 11, Pages 765–772, ISSN (Online) 1865-7117, ISSN (Print) 0932-0776, DOI: https://doi.org/10.1515/znb-2018-0091.

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