Identification of new metastable crystalline phases of organic specimens of volumes of the order of a cubic micron

Abstract

The study by differential scanning calorimetry under atmospheric pressure, of the cooling down to the metastability breakdown and then the heating of chloroform, 1-2 dichlorobenzene, o-xylene, cyclohexane and carbon tetrachloride with volumes about a few mu m³ provides evidence of new metastable crystalline phases of these compounds. For each of these compounds, during heating, one could determine the temperature corresponding to its transformation into either a stable liquid or solid phase or into another metastable phase and also evaluate the molar heat of the corresponding transformation.