Compression of glycolide-h4 to 6 GPa

Hutchison, Ian B. and Bull, Craig L. and Marshall, William G. and Parsons, Simon and Urquhart, Andrew J. and Oswald, Iain D.H. (2017) Compression of glycolide-h4 to 6 GPa. Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 73 (6). pp. 1151-1157. ISSN 2052-5192 (

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This study details the structural characterisation of glycolide-h4 as a function of pressure to 6 GPa using neutron powder diffraction on the PEARL instrument at ISIS Neutron and Muon source. Glycolide-h4, rather than its deuterated isotopologue, was used in this study due to the difficulty of deuteration. The low-background afforded by Zirconia-Toughened Alumina (ZTA) anvils nevertheless enabled the collection of data suitable for structural analysis to be obtained to a pressure of 5 GPa. Glycolide-h4 undergoes a reconstructive phase transition at 0.15 GPa to a previously identified, form-II, which is stable to 6 GPa.