ISIS Neutron and Muon Source Data Journal

Phase evolution in the transition from epsilon to gamma glycine

Abstract: Glycine, the simplest naturally-occurring amino acid, exhibits unusually extensive phase diversity. Three polymorphs are known under ambient conditions. Each shows different behaviour at high pressure, the beta and gamma forms transforming to the delta and epsilon phases, respectively. On release of pressure the epsilon phase transforms back to the gamma phase via two new phases. The zeta phase produced initially is short-lived and its structure remains unsolved. This form appears to develop into an expanded form of the epsilon phase (the epsilon-prime phase), which then transforms into the gamma phase. The zeta and epsilon? phases have both been observed in previous beamtime on PEARL, but the data sets suffer from poor statistics. The aim of this beam time is to collect data on both phases suitable for structural analysis of this very unusual sequence of phase transitions.

Principal Investigator: Professor Simon Parsons
Experimenter: Dr Matthew Tucker
Experimenter: Mr Giles Flowitt-Hill
Experimenter: Dr Helen Playford
Experimenter: Dr Craig Bull
Experimenter: Dr Bill Marshall

DOI: 10.5286/ISIS.E.RB1520301

ISIS Experiment Number: RB1520301

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 Simon Parsons et al; (2015): Phase evolution in the transition from epsilon to gamma glycine, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1520301

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