The a--> P phase transition of Tristearin (SSS) has been investigated both by Differential Scanning Calorimetry and Small Angle X-Ray Diffraction as a function of temperature at the same heating rate ( 2 deglmin ) in order to elucidate either this transition occurs in the solid state or is melt mediated. INTRODUCTION iriglycerides display a complex monotropic polymorphism. They frequently exhib...