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 3
Oxygen ion pseudocubes (left) in α-quartz (space group P3₂21) and (right) in GeO₂ (space group P3₁21) viewed along the crystallographic x-axis with the z-axis vertical. Vectors b_PC and c_PC are the two axes of the pseudocube that enclose angle α_PC. Angles ϕ_h and ϕ_v are tilt angles with horizontal and vertical reference directions. Lines PR and QS are tetrahedral edges (solid lines: at front; dashed lines: at rear).

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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