Hydrothermal synthesis, crystal structures, and optical properties of H[Bi3O(Te3O9)](NO3)2 and [Bi2(TeO3)2](SO4)

The crystal structures of H[Bi3O(Te3O9)](NO3)2 and [Bi2(TeO3)2](SO4) feature one-dimensional chains and three-dimensional framework with one-dimensional tunnel along c axis, respectively.538