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Figure 1
Face-centred cubic (neon, argon, krypton and xenon) and hexagonal close-packed (helium, beryllium and magnesium) crystal structures.

IUCrJ
Volume 7| Part 4| July 2020| Pages 577-578
ISSN: 2052-2525
https://doi.org/10.1107/S2052252520007769