While from the thermodynamic point of view chiral resolutions for systems showing miscibility in the solid state are often not feasible, the kinetics of both solid-solid transformation and crystallization must not be neglected. It has been aimed to determine the course of the solvus line over temperature. Different crystallization conditions have been investigated with regard to their capability to alter the formation of a partial solid solution. Tie lines inside the 2-phase region at thermodynamic equilibrium have been measured. The solid phase composition in equilibrium differs from the phase obtained primarily from cooling crystallization. It has been focussed on the change of the solid phase composition during crystal growth.