Home Multinuclear solid state NMR spectroscopy of ternary rare-earth silicides RET 2Si2 and germanides LaT 2Ge2 (RE = Sc, Y, La, Lu; T = Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Os, Ir, Pt, Au)
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Multinuclear solid state NMR spectroscopy of ternary rare-earth silicides RET 2Si2 and germanides LaT 2Ge2 (RE = Sc, Y, La, Lu; T = Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Os, Ir, Pt, Au)

  • Christopher Benndorf , Hellmut Eckert EMAIL logo and Rainer Pöttgen EMAIL logo
Published/Copyright: July 1, 2024
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Zeitschrift für Kristallographie - Crystalline Materials
From the journal Zeitschrift für Kristallographie - Crystalline Materials Volume 239 Issue 7-8

Abstract

A series of ternary rare earth – transition metal – tetrelides RET 2 Tt 2 (RE = Sc, Y, La, Lu; T = Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Os, Ir, Pt, Au; Tt = Si, Ge) was synthesized by arc melting of the elements and subsequent annealing. The samples were characterized by powder X-ray diffraction and in addition, the structures of REOs2Si2 (RE = Y, La, Lu), LaAu2Si2, LaAg2Ge2 and LaAu2Ge2 were refined from single crystal X-ray diffractometer data. The tetrelides crystallize with the ThCr2Si2 type (I4/mmm) except the platinum compounds which adopt the klassengleiche superstructure of the CaBe2Ge2 type (P4/nmm). The transition metal atoms have tetrahedral tetrel coordination and the tetrahedra condense to layers via common edges. The stacking of these layers leads to Tt−Tt bonds in the ThCr2Si2 type phases and heteroatomic T−Tt bonds in the CaBe2Ge2 type phases. The rare earth atoms fill larger cages within these three-dimensional networks (coordination number 16 with RE@T 8 Tt 8) with site symmetries 4/mmm (ThCr2Si2 type) and 4mm (CaBe2Ge2 type). Systematic multinuclear solid state NMR spectroscopic investigations allowed observing the effect of the involved rare-earth metal, transition metal and tetrel group element, respectively. In particular, 29Si isotropic resonance shifts can be predicted from element-specific increments and interatomic Si–Si bonding interactions manifest themselves in axially symmetric magnetic shielding anisotropies.

Keywords: ternary tetrelides; solid state NMR spectroscopy; crystal structure
Corresponding authors: Hellmut Eckert, Institut für Physikalische Chemie, Universität Münster, Corrensstraße 28-30, 48149 Münster, Germany; and Institute of Physics in São Carlos, University of São Paulo, São Carlos, SP 13560-590, Brazil, E-mail: ; and Rainer Pöttgen, Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, 48149 Münster, Germany, E-mail:

Acknowledgments

We thank Dipl.-Ing. U. Ch. Rodewald for collecting the single crystal intensity data.

  1. Research ethics: Not applicable.

  2. Author contribution: All authors have accepted responsibility for the entire content of this submitted manuscript and approved the submission.

  3. Conflict of interest: The authors declare no conflicts of interest regarding this article.

  4. Research funding: This research was funded by Universität Münster.

  5. Data availability: Data is available from the corresponding authors on well-founded request.

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Supplementary Material

This article contains supplementary material (https://doi.org/10.1515/zkri-2024-0068).

Received: 2024-02-14
Accepted: 2024-04-04
Published Online: 2024-07-01
Published in Print: 2024-08-27

© 2024 Walter de Gruyter GmbH, Berlin/Boston

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  4. Structural influences of the substituents of tridentate triazole-based ligands – more than just a minor role in the solid-state structure
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https://doi.org/10.1515/zkri-2024-0068
Keywords for this article
ternary tetrelides; solid state NMR spectroscopy; crystal structure

Articles in the same Issue

  1. Frontmatter
  2. In this issue
  3. Organic and Metalorganic Crystal Structures (Original Paper)
  4. Structural influences of the substituents of tridentate triazole-based ligands – more than just a minor role in the solid-state structure
  5. Inorganic Crystal Structures (Original Paper)
  6. Multinuclear solid state NMR spectroscopy of ternary rare-earth silicides RET 2Si2 and germanides LaT 2Ge2 (RE = Sc, Y, La, Lu; T = Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Os, Ir, Pt, Au)
  7. [Cd7(SeO3)8]{Cu2Br2}, a host-guest structure derived from β-CdSeO3
  8. Mechanochemical synthesis of (Mg1−xFe x )2SiO4 olivine phases relevant to Martian regolith: structural and spectroscopic characterizations
  9. CaRu2Zn10, SrRu2Zn10 and EuRu2Zn10 – new superstructure variants of ThMn12
  10. Organic and Metalorganic Crystal Structures (Original Paper)
  11. Crystal structure and tautomeric state of Pigment Red 48:2 from X-ray powder diffraction and solid-state NMR
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