Mixed-valence uranium germanate and silicate: Cs x(U VO)(U IV/VO) 2(Ge 2O 7) 2 (x = 3.18) and Cs 4(U VO)(U IV/VO) 2(Si 2O 7) 2

Chun Liang Chen, Quang Bac Nguyen, Chih Shan Chen, Kwang Hwa Lii

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Abstract

A new mixed-valence uranium germanate and the silicate analogue have been synthesized under hydrothermal conditions at 600 °C and 165 MPa. Their crystal structures contain infinite -U V-O-U IV/V-O-U IV/V-O-U V- chains that are connected by Ge 2O 7 or Si 2O 7 groups to form a 3D framework with six-ring channels where the Cs + cations are located. Two of the Cs sites in the germanate are partially occupied. Bond-valence-sum calculation and an U 4f X-ray photoelectron spectroscopy study confirm the valence states of the uranium.

Original languageEnglish
Pages (from-to)7463-7465
Number of pages3
JournalInorganic Chemistry
Volume51
Issue number14
DOIs
StatePublished - 16 Jul 2012

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