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The hypernetted chain approximation is used to study the phase
diagram of a simple hardcore Yukawa model of a charge-stabilized
colloids. We calculate the static structure factor, the pair
distribution function, and the collective mode energies over a
wide range of parameters, and the results are used for studying
the freezing transition of the system. The resulting phase diagram
is in good agreement with the known estimates and the Monte Carlo
simulations.
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