Abstract
The structure of single crystals of the double lithium-yttrium borate Li6YB3O9 is investigated. It is shown that the cleavage planes are parallel to the layers that are located at the largest distance from each other and characterized by the weakest electrostatic interaction. Thus, cleavage of a crystal occurs through the longest Li-O bonds in the lithium five-vertex polyhedra and the bridge Y-O bonds. It is ascertained that slip in Li6YB3O9 occurs in the planes that are most close packed with respect to oxygen ions, while the reason for the absence of plastic deformation at room temperature is that \((10\bar 2)\) B triangles impede the motion of \((\bar 301)\) B triangles.
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Translated from Kristallografiya, Vol. 50, No. 6, 2005, pp. 1060–1064.
Original Russian Text Copyright © 2005 by Dolzhenkova, Baumer, Tolmachev.
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Dolzhenkova, E.F., Baumer, V.N. & Tolmachev, A.V. Slip and cleavage systems in the new crystal Li6YB3O9 . Crystallogr. Rep. 50, 982–985 (2005). https://doi.org/10.1134/1.2132407
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DOI: https://doi.org/10.1134/1.2132407