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Figure 3
The shift occurring to the semibridging and three coplanar carbonyls, represented by plotting their positions in the 343 K refined structure (smaller spheres) on the 28 K overall geometry. All other smaller variations are omitted for clarity. The strain tensor, in the same framework representation, is plotted in the centre of the drawing (the out-of-plane component is small); it clearly indicates that the rearrangement occurring to the anion upon cooling–warming has a tighter connection to the actual compression–expansion of the crystal.

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ISSN: 2053-2733
Volume 60| Part 5| August 2004| Pages 502-509
doi:10.1107/S0108767304015582
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