Acta Crystallographica Section C: Structural Chemistry
The structure of dicaesium digallium diorthoborate oxide constitutes a new type of oxide borate. It consists of a three-dimensional gallium-oxide-orthoborate lattice with Cs atoms occupying large cavities in the lattice. This lattice is made from pairs of Ga atoms connected through a shared O atom along the  direction; these Ga dimers are interconnected through shared O vertices to trigonal BO3 groups along the ,  and [i10] directions, completing the tetrahedral coordination environment of each Ga atom.
Smith, Robert W., "Cs2Ga2O(BO3)2" (1995). Chemistry Faculty Publications. 55.
This article may be found on the journal's website here: https://doi.org/10.1107/S0108270194009418.