  Effect of uniaxial single-ion anisotropy upon magnetic properties of a mixed
spin-1/2 and spin-S (S>=1) Ising model on a bathroom tile (4-8) lattice is
examined within the framework of an exact star-triangle mapping transformation.
The particular attention is focused on the phase diagrams established for
several values of the quantum spin number S. It is shown that the mixed-spin
bathroom tile lattice exhibits very similar phase boundaries as the mixed-spin
honeycomb lattice whose critical points are merely slightly enhanced with
respect to the former ones. The influence of uniaxial single-ion anisotropy
upon the total magnetization vs. temperature dependence is particularly
investigated as well.
