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Figure 4
Fourier map in the x3–x4 plane for Ba in the modulated composite on the top and in the modulated-layer structure on the left bottom. The atomic domains are drawn as heavy solid lines. The increment of the contour lines is 15 e Å−3. On the right bottom the electron density in the x1–x4 plane for Ba in the modulated composite is shown to justify and visualize the discontinuity and the existence of crenels in the Ba modulation.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 62| Part 2| March 2006| Pages 197-204
doi:10.1107/S0108768105039212
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