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Figure 2
(a) Displacement-ellipsoid illustration for a praseodymium complex that was wrongly refined with Z′ = 2 in space group P1. Note that the largest components of the ellipsoids of `inversion'-related atom pairs are perpendicular. (b) Displacement-ellipsoid illustration of the same complex refined with Z′ = 1 in space group P[{\overline 1}]. Note in (a) the inversion centre in the centre of the figure that relates the two molecules.

Journal logoBIOLOGICAL
CRYSTALLOGRAPHY
ISSN: 1399-0047
Volume 65| Part 2| January 2009| Pages 148-155
doi:10.1107/S090744490804362X
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