There are two possible X–X interactions that may be significant: the 180° X–X σ interaction and the 90° X–X interaction ( Fig. 6 ).
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A pencil-and-paper method for elucidating halide double perovskite band structures.
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There are two possible X–X interactions that may be significant: the 180° X–X σ interaction and the 90° X–X interaction ( Fig. 6 ).