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Structural investigations of UTeO4

Published online by Cambridge University Press:  05 March 2012

S. N. Tripathi and
P. N. Namboodiri
S. N. Tripathi*
Affiliation:
Applied Chemistry Division, Bhabha Atomic Research Centre, Tombay, Mumbai-400085, India
P. N. Namboodiri
Affiliation:
Applied Chemistry Division, Bhabha Atomic Research Centre, Tombay, Mumbai-400085, India
*
a)Electronic mail: sntrip@rediffmail.com
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Abstract

Our X-ray powder diffraction data determine that UTeO4 has an orthorhombic unit cell with parameters: a=10.115±0.003 Å, b=10.706±0.002 Å, c=7.833±0.002 Å, and v=848±0.40 (Å)3, i.e., the cell volume twice as large as that of UTeO5. IR spectral studies show that UTeO4 and UTeO5 have almost an identical molecular symmetry. In UTeO4, the effective environment of U and Te remains nearly the same as in UTeO5 and the UO2 group is noncentrosymmetric and nonlinear with little or no interaction with equatorial oxygen. Frequencies of the characteristic stretching bands of UTeO4 are (cm−1): νas (O=U=O)=945, νs (O=U=O)=880, νs (Te–O)eq=818, νas (Te–O)eq=749, νas (Te–O)ax=649, νs (Te–O)ax=561.

Keywords

X-ray diffractionunit cell parametersIR spectra

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Type
New Diffraction Data
Information
Powder Diffraction , Volume 18 , Issue 1 , March 2003, pp. 42 - 46
Copyright
Copyright © Cambridge University Press 2003

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