Abstract
Crystals of new indium iodate (K0.6Na0.4Ba)In[IO3]6 were prepared by the hydrothermal synthesis. The unit-cell parameters are a = 11.3984(3) Å, с = 11.3817(3) Å, sp. gr. R3̅. The chemical formula of the compound was derived from the structure determination and refinement with anisotropic displacement parameters to R = 0.0284. In the structure the InO6 octahedra share vertices with six umbrella-like [IO3]–groups typical of iodates and form isolated 3̅-symmetric charged \(\rm{In[IO_{3}]_6^{3-}}\) clusters. Large Ba, K, and Na cations occupy a common site on a threefold axis due to the isomorphous substitution and compensate the charge of the clusters. The new structure extends the family of the recently discovered alkali-metal and barium iodates containing Ti and Zr atoms in octahedral sites. The iodate K2Ge[IO3]6 containing Ge atoms in the centers of octahedra is the parent compound of this structural family.
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Original Russian Text © E.L. Belokoneva, A.S. Karamysheva, O.V. Dimitrova, A.S. Volkov, 2018, published in Kristallografiya, 2018, Vol. 63, No. 5, pp. 719–723.
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Belokoneva, E.L., Karamysheva, A.S., Dimitrova, O.V. et al. Synthesis and Crystal Structure of New Indium Iodate (K0.6Na0.4Ba)In[IO3]6. Crystallogr. Rep. 63, 734–737 (2018). https://doi.org/10.1134/S1063774518050048
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DOI: https://doi.org/10.1134/S1063774518050048