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. 2001 Dec 1;106(6):997–1012. doi: 10.6028/jres.106.051

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The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.

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Fig. 7 — (a) High-resolution two-dimensional lattice image from a fragment of TiO₂:7Nb₂O₅, showing several displacements associated with the presence of isolated 3 × 3 blocks (arrowed) in the matrix of 4 × 3 blocks. (b) Idealized model of the area outlined in (a). The crystallographic shear (CS) planes (containing tetrahedral metal atoms) are marked. They suffer a displacement at the points where 3 × 3 blocks (arrowed) occur.