Periodates of Tetravalent Titanium, Zirconium, Hafnium and Thorium: Synthesis, Characterisation and EXAFS Study | Zendy

Hector Andrew L. | Zendy; Levason William | Zendy

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Periodates of Tetravalent Titanium, Zirconium, Hafnium and Thorium: Synthesis, Characterisation and EXAFS Study

Author(s) -

Hector Andrew L.,

Levason William

Publication year - 2005

Publication title -

european journal of inorganic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.667

H-Index - 136

eISSN - 1099-0682

pISSN - 1434-1948

DOI - 10.1002/ejic.200500169

Subject(s) - chemistry , thorium , extended x ray absorption fine structure , nitric acid , zirconium , inorganic chemistry , aqueous solution , titanium , periodate , hafnium , protonation , nuclear chemistry , uranium , absorption spectroscopy , ion , organic chemistry , metallurgy , materials science , physics , quantum mechanics

Reaction of TiO(SO 4 ) · x H 2 O with periodic acid in aqueous solution at pH = 2 yields a precipitate of Ti 2 O 2 HIO 6 · 5H 2 O, while reaction of zirconyl, hafnyl or thorium nitrate with periodic acid in hot aqueous nitric acid solutions yields MHIO 6 · x H 2 O (M = Zr, Hf, Th; x = 4 or 5). The thorium periodate is soluble in aqueous KOH and KThIO 6 · 4H 2 O can be precipitated from these solutions. The zirconium, hafnium and both thorium periodates are shown by EXAFS to consist of edge‐sharing chains of MO 8 and IO 6 units, IR and Raman studies indicate protonation of periodate in the MHIO 6 modifications. The titanium periodate contains vertex‐sharing IO 6 groups. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)

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