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Figure 9
(a) The USPEX-searched ground-state WB4 phase (hP10-WB4), (b) the metastable hR15-WB4 phase and (c) the previous experimentally attributed structure (hP20-WB4). Blue and pink spheres represent W and B atoms, respectively. A, B, C, K, K′, L and K′ indicate the different layer types in the packing, as discussed in the text. |