  We have performed a Monte Carlo study of a classical three dimensional
Coulomb system in which we systematically increase the positional disorder. We
start from a completely ordered system and gradually transition to a Coulomb
glass. The phase transition as a function of temperature is second order for
all values of disorder. We use finite size scaling to determine the transition
temperature T_C and the critical exponent nu. We find that T_C decreases and
that nu increases with increasing disorder. We also observe changes in the
specific heat, the single particle density of states, and the staggered
occupation as a function of disorder and temperature.
