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Figure 9
Distribution of O—Si—Si—O torsion angles during heating, starting from the MX1-tridymite structure. Two distributions were calculated, i.e. that in the XY plane and that out of the XY plane, each based on its average coordinates at temperatures of 10, 300, 700 and 1100 K.

IUCrJ
Volume 5| Part 3| May 2018| Pages 325-334
ISSN: 2052-2525
https://doi.org/10.1107/S2052252518004803