Results of differential scanning calorimetric studies on the Mg_0.10As_0.34Se_0.56 chalcogenide glass are reported. The heating rate dependence of the glass transition temperature (T_g), the crystallization onset temperature (T_c) and the crystallization peak temperature (T_p) were studied. These parameters were utilized in the determination of the activation energy of the glass transition (E_g), the activation energy of crystallization (E_c), the Avrami exponent (n) and the frequency factor K₀. E_g was determined from the variation of T_g with the heating rate β and its average value <E_g>=197±5 kJ/mol. E_c was determined using several methods; it gives the average value <E_c>=116±16 kJ/mol. The present investigation indicates that both the glass transition and the crystallization processes occur in a single stage, since the thermograms exhibit a unique value for both T_g and T_p. The crystallization mechanisms for the Mg_0.10 …