Novel cesium cerium(iv) iodate Cs2Ce(IO3)6: hydrothermal synthesis, crystal structures and thermal stability

New cesium cerium(iv) iodate Cs2Ce(IO3)6 was successfully prepared by applying a hydrothermal technique from starting reagents CsF, CeO2, H5IO6 and HIO3 at 230 °C. Cs2Ce(IO3)6 was analyzed via single crystal and powder XRD, EDX, IR spectroscopy and thermal analysis. The new compound crystallizes in...

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Published inCrystEngComm Vol. 26; no. 39; pp. 5599 - 5606
Main Authors Grigorieva, Oksana P, Shvanskaya, Larisa V, Shatalova, Tatiana B, Zolotarev, Andrey A, Berdonosov, Peter S, Dolgikh, Valery A
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 07.10.2024
Subjects
Cerium oxides
Cesium fluorides
Crystal structure
Differential thermal analysis
Graph theory
Hydrothermal crystal growth
Infrared spectroscopy
Reagents
Single crystals
Thermal stability
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Summary:New cesium cerium(iv) iodate Cs2Ce(IO3)6 was successfully prepared by applying a hydrothermal technique from starting reagents CsF, CeO2, H5IO6 and HIO3 at 230 °C. Cs2Ce(IO3)6 was analyzed via single crystal and powder XRD, EDX, IR spectroscopy and thermal analysis. The new compound crystallizes in the monoclinic space group C2/c with a = 14.0652(3) Å, b = 8.1890(2) Å, c = 17.7211(4) Å, β = 103.601(2)°, V = 1983.99(8) Å3, and Z = 4. The crystal structure of Cs2Ce(IO3)6 consists of CeO8 square antiprisms sharing their apexes and edges with trigonal pyramidal IO3− groups to form layers [Ce(IO3)6]2− parallel to the ab plane. These layers are further stabilised by a 12-vertex polyhedron, CsO12, situated in their voids. The IR spectrum of Cs2Ce(IO3)6 displays iodate group bands. According to DTA analysis, cesium cerium(iv) iodate exhibits high thermal stability in the air at temperatures up to 414 °C.
ISSN:1466-8033
DOI:10.1039/d4ce00722k