Occupancy Model for Predicting the Crystal Morphologies Influenced by Solvents and Temperature, and Its Application to Nitroamine Explosives
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Abstract
A new occupancy model for predicting the crystal morphologies influenced by solvent and temperature is proposed. In the model, the attachment energy is corrected by a relative occupancy, which is the occupancy of a solute molecule relative to the total ones of a solute molecule and a solvent molecule. The occupancy is defined proportional to the averaged interaction energy between a solute or solvent molecule and a crystal surface. The validity of the model is confirmed by its successful applications to predict the crystal morphologies of a class of well-known nitroamino explosives hexahydro-1,3,5-trinitro-1,3,5- triazine, octahydro-1,3,5,7-tertranitro-1,3,5,7-tetrazocine and 2,4,6,8,10,12-hexanitrohexaaz-aisowurtzitane grown in solution. Furthermore, the applications of this model regarding concentration, molecular diffusion ability in solution, and mixed solvents are prospected.
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