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Figure 8
Model functions of the displacive modulation for (a) x, (b) y of the O2 atom and (c) the derived structure. Symmetry operations are (i) x1, x2, x3, x4; (ii) x1 + ½, x2 + ½, x3, x4 + ½; (x) x1 − ½, x2 − ½, x3, x4 − ½; (xi) x1 − ½, x2 + ½, x3, x4 − ½.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 57| Part 4| July 2001| Pages 458-465
doi:10.1107/S0108768101005432
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