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Figure 2
(a) Rietveld fit of the neutron powder diffraction pattern of ζ-glycine at 100 K (blue = observed, red = calculated). In addition to the peaks from ζ-glycine, the pattern also shows the presence of residual ɛ- and a trace of γ-glycine. Other peaks arise from the sample environment, namely the lead pressure marker and the Al2O3 and ZrO2 components of the anvils of the pressure cell. (b) Rietveld fit of the neutron powder diffraction pattern of β-glycine (contaminated with ζ- and a trace of γ-glycine) at 290 K. A 1 Å d spacing approximates to 4837 µs in time-of-flight.

IUCrJ
Volume 4| Part 5| September 2017| Pages 569-574
ISSN: 2052-2525
https://doi.org/10.1107/S205225251701096X