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 2
(a) The O₄ tetrahedron corresponding to the silicon ion at x, 0, $[{2 \over 3}]$ (as in space group P3₂21) and its corresponding pseudocube. Length a_PC is shown. (b) The pseudocube shown in projection perpendicular to the x-axis [O₄(mp): centre-of-coordinates of O₄ tetrahedron and associated pseudocube; ϕ_h,ϕ_v: horizontally and vertically defined pseudocubic tilt angles]. (Modifed from an original figure given by Reifenberg & Thomas, 2018

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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