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Figure 8
(a) One three-connected ladder-like fragment of PN4 tetrahedra extracted from Ge2+(P+)2(N−)4 ≡ Ψ-Zn0Si2O4 structure represented in Fig. 6[link](a). On the right-hand side, we have maintained two additional tetrahedra to illustrate its provenance from a four-connected network. P: violet; N: blue. (b) The partial structure of the [AlSiO5]3− ≡ Ψ-P2O5 in Al2SiO5 (sillimanite). Al: yellow; Si: dark gray; O: red.

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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