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Re-determining the Nowotny chimney–ladder structure VGe1.82 from powder diffraction data
Published online by Cambridge University Press: 01 March 2012
Abstract
The Nowotny chimney–ladder compound VGe1.82 was redetermined from powder diffraction data and modelled with the incommensurately modulated composite approach. The dimensions of the tetragonal unit subcells are a=5.9015(3) Å, cGe=2.6916(2)Å, and cV=4.9080(2)Å and the one-dimensional modulation vectors are qGe=0.45159(1)[001]* and qV=0.17656(1)[001]*. Comparison is made with a previous reported commensurate approximation of the structure with a 31-fold cGe axis.
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