TiNiSi‐Type <i>A</i> LiAu ( <i>A</i> = Ca, Sr, Ba, Eu, Yb) Compounds: Alternative Use of “Excess” Electrons
New TiNiSi-type compounds ALiAu (A = Ca, Sr, Ba, Eu, Yb) were obtained in the form of mm-sized single crystals by high-temperature centrifugation-aided filtration from lithium melt. They are the first examples of TiNiSi-type representatives containing Li and a transition metal. The metallic phases show paramagnetic (Ca) or diamagnetic (Sr, Ba, Yb) behavior or antiferromagnetic ordering below 19 K (Eu). A new structural description is based on a hexagonal close packing with A occupying all octahedral and Li occupying half of the tetrahedral voids in an ordered fashion. Chemical bonding analysis supports the structural description and reveals the formation of eight-atomic stella-quadrangula bonds pinned on the empty tetrahedral holes, a bonding picture known from elemental metals.
Authors
- Peter Höhn (ORCID: https://orcid.org/0000-0002-5248-222X)
- Matej Bobnar (ORCID: https://orcid.org/0000-0002-0748-981X)
- Yurii Prots (ORCID: https://orcid.org/0000-0002-7418-9892)
- Mitja Krnel (ORCID: https://orcid.org/0000-0002-8580-2381)
- Yuri Grin (ORCID: https://orcid.org/0000-0003-3891-9584)
- Frank R. Wagner (ORCID: https://orcid.org/0000-0003-2382-2261)
- Marcus Schmidt (ORCID: https://orcid.org/0000-0002-8349-7125)
- Primoz Koželj (ORCID: https://orcid.org/0000-0001-9837-7516)
- Daniel Menéndez Crespo (ORCID: https://orcid.org/0000-0002-0727-7702)
Institutions
- Max Planck Society (DE)
- University of Ljubljana (SI)
- Jožef Stefan Institute (SI)
- Max Planck Institute for Chemical Physics of Solids (DE)
- Institute of Mathematics, Physics, and Mechanics (SI)
Publication Details
- Journal
- Chemistry - A European Journal
- Published
- 2025-03-25
- DOI
- https://doi.org/10.1002/chem.202500134
- Citations
- 1
- Primary Topic
- Rare-earth and actinide compounds
- Type
- article
- Field-Weighted Citation Impact
- 1.26