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Figure 1
(a) The unit cell and (b) the cation chemical environment of CeO2. (c) The unit cell and (d) the cation chemical environment of Gd2O3. d(MM) is the unique Ce–Ce NN pair distance in CeO2, while in Gd2O3 two different NN Gd–Gd distances are present, d(MM)short and d(MM)long.

IUCrJ
Volume 2| Part 5| September 2015| Pages 511-522
ISSN: 2052-2525
https://doi.org/10.1107/S2052252515011641