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Figure 1
Unit cell of CaF2 with (a) Ca atoms positioned externally, at the faces and edges of the cell, and (b) Ca atoms positioned internally. (c) CrystalWalk interface (adapted) displaying the fluorite motif, with the cropped unit cell and sublattices of Ca (grey) and F (red and blue). Source: (a) adapted from Askeland (1990BB1); (b) adapted from Callister & Rethwisch (2007BB2).

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 50| Part 3| June 2017| Pages 949-950
https://doi.org/10.1107/S160057671700560X
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