[1] School of Chemistry and EaStChem, University of Edinburgh, King's Buildings, West Mains Road, Edinburgh EH9 3JJ, United Kingdom
[2] Centre for Science at Extreme Conditions, University of Edinburgh, Erskine Williamson Building, Mayfield Road, Edinburgh EH9 3JZ, United Kingdom
[3] Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex, France
[4] Département de Recherche Fondamentale sur la Matière Condensée, SPSMS, CEA Grenoble, 38054 Grenoble, France
[5] ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QR, United Kingdom
[6] Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
[7] IRI, TU Delft, Mekelweg 15, 2629 JB Delft, Netherlands
[8] School of Chemistry, University of New South Wales, Sydney 2052, Australia