(H₃O)Li₂(IO₃)₃: crystal structure and IR spectrum

The synthesis, IR spectroscopy, thermal and UV-Vis transmittance of the new lithium iodate crystal: (H₃O)Li₂(IO₃)₃, were studied. The crystal structure of (H₃O)⁺·2(Li)⁺· 3(IO₃)^- was determined by single-crystal X-Ray diffraction analysis at 100(2) K. It crystallizes in the monoclinic system (P2₁/n) with the parameters: a = 8.3266(12) Å, b = 10.9893(17) Å, c = 11.2472(17) Å, α = γ = 90°, β = 111.360(4)° and Z(Z') = 4(1). The structure contains a hydronium cation (H₃O)⁺, three crystallographic independent trigonal pyramidal IO₃ anions, and two independent cations (Li)⁺ coordinated each by four oxygen atoms 3(IO₃)^- at the apices of strongly deformed tetrahedrons. The research results have revealed the mechanisms of crystal formation and the characteristic absorption bands of functional groups, which are of scientific importance. The possibility of the existence of certain properties is also discussed.