Growth of Crystals from the Melt in Glass Tubes

Abstract

THE rates of growth of benzophenone and salol from the melt have been investigated. Single crystals were grown freely in the melt, and the rate of advance of a single face was measured by means of a travelling microscope In further experiments the crystal faces were allowed to grow into glass capillary tubes which were situated in the melt normal to the face. The melts were held at constant under-coolings of 4° C or less, by means of a thermostat: under these conditions it was found that on entering the capillary the face remained plane but advanced down the tube at a rapidly diminishing rate, finally practically ceasing to grow altogether. The data on an experiment with the (100) face of salol are as follows: