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Icosahedral coincidence rotations

Published/Copyright: July 28, 2010

Abstract

The coincidence problem for three-dimensional discrete structures with icosahedral symmetry is reinvestigated. We present a parametric description of the coincidence rotations based on special quaternions, called icosian numbers. In particular, we give a characterization of the possible coincidence indices (Σ-factors) and present a complete list of the possible rotations with Σ < 50.

Published Online: 2010-7-28
Published in Print: 1997-7-1

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