the eutectics and the monotectic are determined by the DSC method and have been reported in Table 2. For comparison, the values of enthalpy of fusion of eutectics calculated by the mixture law [18] are also included in the same table. If a eutectic is a simple mechanical mixture of two components, involving no heat of mixing and or no any type of association in the melt, the heat of fusion may simple be given by the mixture law.