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Figure 7
Distribution of Si—O—Si bond angles during heating, starting from the MX1-tridymite structure. Two distributions were calculated, i.e. that in the XY plane and that out of XY plane, each based on its average coordinates at temperatures of 10, 300, 700 and 1100 K. (1) Peak characteristic of the HP structure. (2) Peak characteristic of OC. (3) Peak characteristic of OP. (4) Peak characteristic of MX1.

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