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Acta Cryst. (2007). E63, i160 [ doi:10.1107/S1600536807028942 ]
Abstract: Single crystals of disodium beryllodiborate have been obtained by spontaneous nucleation from a high-temperature melt. Na2[BeB2O5] adopts a new structure type and contains [BeB2O7]6- rings as building units that are made up from one BeO4 tetrahedron and two BO3 triangles. These rings are further condensed and form {[BeB2O5]2-}![[infinity]](/logos/entities/infin_rmgif.gif)
two-dimensional layers extending parallel to the ab plane with the Na+ cations in a [6 + 1] coordination located between the layers. All atoms except Be and an O atom (both with site symmetry .2) are in general positions.
Online 20 June 2007
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