  Lattice distortions associated with charge stripe order in 1/8 hole-doped
La$_{1.875}$Ba$_{0.125-x}$Sr$_{x}$CuO$_{4}$ are studied using synchrotron X-ray
diffraction for $x=0.05$ and $x=0.075$. The propagation wave vector and charge
order correlation lengths are determined with a high accuracy, revealing that
the oblique charge stripes in orthorhombic $x=0.075$ crystal are more
disordered than the aligned stripes in tetragonal $x=0.05$ crystal. The twofold
periodicity of lattice modulations along the c-axis is explained by long-range
Coulomb interactions between holes on neighboring CuO$_{2}$ planes.
