Two for the price of one – Resolvable polymorphism in a ‘single crystal’ of α- and β-Sb3O4I

The title compound forms as biphasic single crystals containing the α- and β-polymorphs. The structure of both polymorphs was solved and refined from single crystal X-ray data in a simultaneous refinement. The structures consist of rods of composition Sb3O4 separated by isolated iodine ions. The two phases differ only in the next nearest neighbour arrangement. The orthorhombic α-phase crystallizes in space group Pbn21, and the monoclinic β-phase in space group P21/n.

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