The proposed experiment involves the local-structural characterisation of a new class of functional material: the “entropy-stabilised oxide”. These are mixtures of 5 or more simple oxides which, if left to their own devices, would form slightly different crystal structures, but when they are heated together they surprisingly form a single phase. This is thought to be because the large amount of entropy (basically a measure of how disorganised something is) in a random mixture overcoming the unfavourable interactions between metals that don't normally hang out together. These materials are likely to exhibit a wide range of properties and have a wealth of applications, but an in-depth understanding of their structure, such as that obtained from total neutron scattering, is required for their potential to be fully realised.