(C4N2H12)[(GeO2)3(BO1.5F)2], a layered borogermanate containing three‐ and nine‐membered rings

A new borogermanate, viz. piperazine‐1,4‐di­ium di­fluoro­nona­oxo­tri­germanium­di­boron, (C₄H₁₂N₂)(GeO₂)₃(BO_1.5F)₂], was solvo/hydro­thermally synthesized. The crystal structure consists of layers composed of three‐membered‐ring Ge₃O₉ subunits and nine‐membered‐ring channels formed by six GeO₄ tetrahedra and three BO₃F tetrahedral pairs. The diprotonated piperazine cations, which lie about inversion centres, are located between adjacent layers and connect the layers via hydrogen bonds.