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Figure 4
VT Raman spectra of polycrystalline powders after 90 min of milling. The temperature ranges are set from 223 to 393 K and from 393 to 223 K at a rate of 5 K min−1. The marked peaks are those characteristic of the β and α forms.

IUCrJ
Volume 8| Part 4| July 2021| Pages 584-594
ISSN: 2052-2525
https://doi.org/10.1107/S2052252521004401