Modelling the structural variation of quartz and germanium dioxide with temperature by means of transformed crystallographic data

Fricke, M.; Thomas, N.W.

doi:10.1107/S2052520621002717

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 12
Variation of $[a_{\rm PC}^{\prime}]$ , $[b_{\rm PC}^{\prime}]$ , $[c_{\rm PC}^{\prime}]$ and $[\alpha _{\rm PC}^{\prime}]$ with reduced order parameter δ′ for α-quartz. Temperatures corresponding to values of δ′ are indicated at the top of the graph. Regular tetrahedra are only possible at values of δ′ up to circa 0.75, as denoted by the red vertical line.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 77| Part 3| June 2021| Pages 427-440

https://doi.org/10.1107/S2052520621002717

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