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Figure 2
(a) Part of the P(Ψ-Si) skeleton in Ca2AlP8N15(NH) showing the four-connectivity of the Ψ-Si atoms. Note the sequence of 4-8-4 rings parallel to the b axis as well as the series of six-membered rings in boat conformation that are parallel to the a axis. (b) Another view of the same skeleton showing the 12-membered ring formed by the 3-4-1-2-4-3-3-4-1-3-3-2 P atoms. The elongated 12-membered ring is that embedding the four Ca atoms, also drawn in Fig. 1[link].

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 81| Part 4| August 2025| Pages 378-394
https://doi.org/10.1107/S2052520625004263
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