In this study we have developed a mean-field model to obtain the phase
diagram for a mixture of liquid crystals. Our mean-field model gives
the phase diagram of the nematic, smectic A and smectic C phases near
the NAC point. We have fitted our model to the experimentally observed
data. From this fitting, we conclude that our mean-field model explai
ns correctly the experimentally observed behavior of a mixed liquid cr
ystalline system near the NAC point.