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Figure 1
Bärnighausen tree for the wurtzite-derived nitrides and oxide nitrides. The transformation of the basis vector is given below the maximal subgroup-type symbol and index, only if it changes. The respective structure types are given in green. The tables on the left depict the site splitting in the relationship between the Lonsdaleite type and the Na2SiO3 type. The atomic coordinates for AlN (Schulz & Thiemann, 1977BB52) and Ge2LiN3 (Häusler, Niklaus et al., 2018BB26) are taken from the literature as example cases for the wurtzite type and the Na2SiO3 type, respectively.

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ISSN: 2053-2733
Volume 77| Part 3| May 2021| Pages 208-216
https://doi.org/10.1107/S2053273320015971
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