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Figure 6
The two simplest tetrahedral structures AX[_2] with close-packed anions and all X and all A atoms symmetrically equivalent. (a) P42/nmc realized e.g. by red HgI[_2], (b) [I\bar{4}2d], e.g. [\alpha]-ZnCl[_2], in the same orientation as one of the diamantoid networks in Fig. 4[link].

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 58| Part 6| November 2002| Pages 914-920
doi:10.1107/S0108768102016191
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