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Figure 4
Views from the [001] (left) and [010] (right) directions of the optimized (001) surface of the (a), (b) 001-A-Na2, (c), (d) 001-B-Na6 and (e), (f) 001-AB-Na2 models. Phosphate groups are represented as sticks and Ca atoms as small spheres for the sake of clarity. Colour coding for atoms: pale cyan denotes calcium, yellow phosphor, red oxygen, grey hydrogen, ochre carbon and blue sodium.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 49| Part 6| December 2016| Pages 1893-1903
https://doi.org/10.1107/S160057671601390X
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