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Figure 4
Arrangement of the AT octahedra and/or trigonal prisms in (a) apatite-2S, where a small X anion is positioned in the A3T triangle, (b) ganomalite-3S with the X-site vacant and (c) nasonite-4S that contains a large X anion centred in the AT6 polyhedra.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 66| Part 1| February 2010| Pages 1-16
https://doi.org/10.1107/S0108768109053981
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