ISIS Neutron and Muon Source Data Journal

Symmetry Breaking in K2IrCL6 and related halides

Abstract: The present proposal seeks to establish the origin of the observed anomalies in the temperature dependence of the M-X bond distances in some cubic antifluorite-type A2MX6 (A = alkali metals; M = Metal; X = halides) hexahalides. We propose that this originates from disordered tilts of the MX6 octahedra that locally breaks the cubic symmetry that remains intact over larger length scales. The persistence of such disorder to very low temperatures is believed to be a consequence of very weak interactions between neighbouring MX6 octahedra. We will achieve this through variable temperature total scattering studies of three compounds: K2IrCl6, K2PtCl6, and K2SnCl6

Principal Investigator: Professor Brendan Kennedy
Local Contact: Professor David Keen
Experimenter: Dr Frederick Marlton
Local Contact: Dr Gabriel Perez
Experimenter: Mr Caleb Bennett

DOI: 10.5286/ISIS.E.RB2410093

ISIS Experiment Number: RB2410093

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Brendan Kennedy et al; (2025): Symmetry Breaking in K2IrCL6 and related halides, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2410093

Data is released under the CC-BY-4.0 license.