Acta Cryst. (2002). E58, i85-i87 [ doi:10.1107/S1600536802015659 ]
Abstract: Rubidium aluminium borate, Rb2Al2B2O7, is characterized by an association of AlO4 tetrahedra and BO3 triangles which form a complete three-dimensional aluminium borate framework. Rb+ cations occupy eight- and nine-coordinate positions within the three-dimensional channel system created by the framework.
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