inorganic compounds
The crystal structure of dipotassium iron(III) {hydrogen bis[hydrogenphosphate(V)]} difluoride, K2Fe[H(HPO4)2]F2, obtained by hydrothermal synthesis, was determined from single-crystal X-ray diffraction data. The structure is characterized by K+ cations and hydrogen-bonded {[Fe[H(HPO4)2]F2]2-}n chains, which consist of centrosymmetric Fe[F2O4] octahedra linked to their four neighbouring phosphate tetrahedra via common O corners, developing a three-dimensional structure.