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Figure 1 . Part of the structure of (I), showing the coordination of the Gd atom with the atomic numbering scheme. Non-H atoms are shown with 30% probability displacement ellipsoids, H atoms as spheres of arbitrary radius. [Symmetry codes: (i) 2 − x, −y, 1 − z; (ii) 1 − x, y, 1 − z; (iii) 1 + x, y, z.] |