In situ high-temperature X-ray diffraction study of phase transformations in silver behenate

摘要

In situ high-temperature X-ray diffraction (XRD) data have been collected for silver behenate, CH_3(CH_2)_(20)COOAg. In the absence of development chemistry silver behenate exhibits four phase transformations when heated from room temperature to 200 ℃. Combining XRD and differential scanning calorimetry (DSC) results, the phase transformation temperatures and phase types have been determined. Types Ⅰ, Ⅱ, and Ⅲ forms of silver behenate are found to be crystalline phases, whereas Types Ⅳ and Ⅴ forms are liquid crystal phases.