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Figure 4
The z = ¼ plane, with projections of green planes (Fig. 2[link]) and their tie-lines (Fig. 1[link]) drawn in. (M2)O6 octahedra and TO4 tetrahedra are shown in pink and light blue, respectively. Contributions of this plane and the symmetry-related z = ¾ plane to an (M1)O6 octahedron at ½½½ are also shown. The definitive pathway ABCDE is made up alternately of tetrahedral edges exy and octahedral stalks s2. Parameters t2 and ft relate to the oxygen ion structure of TO4 tetrahedra.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 73| Part 1| February 2017| Pages 74-86
https://doi.org/10.1107/S2052520616018308
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