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Figure 11
P—O2—P angle as a function of the internal coordinate t. Lines show the distances in the incommensurate structure and crosses mark the distances in the commensurate structure at the six realised sections (indicated by the dashed vertical lines). Note that the two parts of the curve correspond to two alternating orientations of the P2O7 groups with the acute P—O—P angle pointing towards +b and −b, respectively (see Fig. 12[link]). The disordered part of the incommensurate structure is omitted.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 62| Part 4| July 2006| Pages 556-566
doi:10.1107/S0108768106010238
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