Surface Features of Alkali Halide Crystals Pulled from the Melt
- 1 January 1963
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 34 (1) , 142-143
- https://doi.org/10.1063/1.1729055
Abstract
An examination of sodium chloride and potassium chloride single crystals pulled from the melt by a method based on that of Czochralski reveals facets, stepped surfaces, and ridges on the surfaces of the crystals. By growing crystals of various axial orientations under different conditions, an empirical rule has been formulated and tested. This rule predicts the occurrence of the three types of surfaces. It is shown that facets, which appear to result from growth under conditions of thermal equilibrium, can occur when the major portion of the crystal is growing under nonequilibrium conditions. An explanation in terms of forces associated with the meniscus and of thermal effects is proposed. Photographs of three crystals are included.This publication has 3 references indexed in Scilit:
- Growth of monocrystals of germanium from an undercooled meltProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1955
- Preparation of Germanium Single CrystalsProceedings of the IRE, 1952
- Some Theorems on the Free Energies of Crystal SurfacesPhysical Review B, 1951