Crystal structure of <a href="https://en.wikipedia.org/wiki/Bismuth(III)_iodide" class="extiw" title="en:Bismuth(III) iodide">en:Bismuth(III) iodide</a>
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Eigenes Werk (own work), data source: C. J. Carmalt et.al.: <i>Tetrahydrofuran Adducts of Bismuth Trichloride and Bismuth Tribromide</i>. In: Inorg. Chem., 1996, 35 (12), 3709-3712.