The structure of rubidium dilithium digallium tris(borate), RbLi2Ga2(BO3)(3
), contains two-dimensional sheets of open-branched rings of GaO4 tetrahedr
a and planar BO3 triangles that are joined by LiO4 tetrahedra to form a thr
ee-dimensional framework. Ten-coordinate Rb atoms lie on twofold axes and o
ccupy channels within the framework that extend along the b axis.