Hydroflux synthesis and crystal structure of Tl3IO

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Abstract

Single-crystals of thallium(I) iodide oxide Tl3IO were obtained as by-product in a hydroflux synthesis at 473 K for 10 h. A potassium hydroxide hydroflux with a water-base molar ratio of 1.6 and the starting materials TlNO3, RhI3 and Ba(NO3)2 was used, resulting in a few black needle-shaped crystals. X-ray diffraction on a single-crystal revealed the hexagonal space group P63/mmc (No. 194) with lattice parameters a = 7.1512 (3) Å and c = 6.3639 (3) Å. Tl3IO crystallizes as hexagonal anti-perovskite (anti-BaNiO3 type) and is thus structurally related to the alkali-metal halide/auride oxides M3XO (M = K, Rb, Cs; X = Cl, Br, I, Au). The oxygen atoms center thallium octahedra. The [OTl6] octahedra share trans faces, forming a linear chain along [001]. Twelve thallium atoms surround each iodine atom in an [ITl12] anti-cuboctahedron. Thallium and iodine atoms together form a hexagonal close-sphere packing, in which every fourth octahedral void is occupied by oxygen.

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APA

Albrecht, R., Menning, H., Doert, T., & Ruck, M. (2020). Hydroflux synthesis and crystal structure of Tl3IO. Acta Crystallographica Section E: Crystallographic Communications, 76, 1638–1640. https://doi.org/10.1107/S2056989020012359

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