Hydrothermal synthesis and structural characterization of the first indium phosphite In2(HPO3)3(H2O)

The first indium phosphite In2(HPO3)3(H2O) has been synthesized hydrothermally. The structure of the compound consists of In2O10 dimer and pseudo pyramidal [HPO3]2−, which are connected by sharing vertexes to form indium phosphite layers in the ac plane. These undulate layers are stacked in ABAB sequence along the crystallographic b-axis through bonds of P–O–In, generating the 3D framework with a In/P ratio of 2/3.