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. 2022 Feb 21;9:59. doi: 10.1038/s41597-022-01158-z

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© The Author(s) 2022

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Fig. 7 — The calculated patterns of electronic charge density ρ(r) of (a) ABC₃ type, CsPbI₃ [The right panel reprint with permission from ref. ⁴⁴. Copyright 2011 Elsevier] and (b) AB₂C₄ type, MgAl₂O₄ [The right panel reprint with permission from ref. ⁴⁹. Copyright 2014 Elsevier].