Hydrothermal synthesis, crystal structures, and magnetic properties of a novel three-dimensional iron phosphite: NH4·[Fe2IIFeIII(HPO3)4]

A three-dimensional iron phosphite, NH4·[Fe2IIFeIII(HPO3)4], has been synthesized under mild hydrothermal conditions and characterized by single crystal X-ray diffraction. The compound forms three-dimensional framework with six-membered channels along the c-axis. Magnetic measurement indicates the anti-ferromagnetic interactions in the title compound.