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Y4Be33Pt16 - a non-centrosymmetric cage superconductor with multi-centre bonding in the framework

MPS-Authors
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Amon,  Alfred
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Svanidze,  Eteri
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Prots,  Yurii
Yuri Prots, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Nicklas,  Michael
Michael Nicklas, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Burkhardt,  Ulrich
Ulrich Burkhardt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Ormeci,  Alim
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Leithe-Jasper,  Andreas
Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Grin,  Yuri
Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Amon, A., Svanidze, E., Prots, Y., Nicklas, M., Burkhardt, U., Ormeci, A., et al. (2020). Y4Be33Pt16 - a non-centrosymmetric cage superconductor with multi-centre bonding in the framework. Dalton Transactions, 49(27), 9362-9368. doi:10.1039/d0dt01374a.


Cite as: https://hdl.handle.net/21.11116/0000-0006-CB1E-5
Abstract
The new ternary compound Y4Be33Pt16 was prepared from elements by arc melting, and its crystal structure was determined from single-crystal X-ray diffraction data (space group I (4) over bar 3d, a = 13.4849(3) angstrom). The material is the first representative of a new structure type of complex intermetallic compounds and reveals a cage-like crystal structure. Analysis of chemical bonding by means of the electron localizabilty approach indicates ionic interaction of yttrium with the rest of the crystal structure, characteristic for cage compounds, in particular for clathrates. In contrast to the mostly two-centre bonding in the framework of clathrates, the new compound is characterized by a multi-centre interaction within the framework, caused by the demand of the valence electrons in the system. The non-centrosymmetric material enters the superconducting state at T-C = 0.9 K.