Phase transitions and (p–T–X) behaviour of centrosymmetric perovskites: modelling with transformed crystallographic data

Thomas, N.W.

doi:10.1107/S2052520621012713

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

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Figure 1
Tilting of regular octahedra about the x_PC and y_PC axes, as in space group Pbnm. Pseudocubic axes x_PC, y_PC and z_PC are directed parallel to orthorhombic vectors $[\left [{1\bar 10} \right]]$ , [110 ] and [001], respectively. (a) Tilting around the y_PC axis (in clinographic projection) with θ_y the angles of inclination of stalks of length s to the axis; (b) Tilting around the z_PC axis (head-on view showing mirror planes); (c) y_PC-axis tilting [as in (a)] viewed along the y_PC axis towards the origin; (d) z_PC-axis tilting [as in (b)] viewed along the z_PC axis towards the origin.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 78| Part 1| February 2022| Pages 40-60

https://doi.org/10.1107/S2052520621012713

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