RbGa3(P3O10)2: a new gallium phosphate isotypic with RbAl3(P3O10)2

Rubidium trigallium bis(triphosphate), RbGa₃(P₃O₁₀)₂ has been synthesized by solid‐state reaction and studied by single‐crystal X‐ray diffraction at room temperature. This compound is the first anhydrous gallium phosphate containing both GaO₄ tetra­hedra (Ga1) and GaO₆ octa­hedra (Ga2 and Ga3). The three independent Ga atoms are located on sites with imposed symmetry 2 (Wickoff positions 4a for Ga1 and 4b for Ga2 and Ga3). The GaO₄ and GaO₆ polyhedra are connected through the apices to triphosphate groups and form a three‐dimensionnal host lattice. This framework presents inter­secting tunnels running along the 001] and <110> directions, where the Rb²⁺ cations are located on sites with imposed symmetry 2 (Wickoff position 4a). The structure also exhibits remarkable features, such as infinite helical columns created by the junction of GaO₄ and PO₄ tetra­hedra.