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Synthesis, Ultrapurification and Analysis of LaF3 for Fluoride Optical Fibers
Lanthanum chloride was synthesized by reacting La2O3 with CCl4. Purification carried out by zone refining resulted in reduction of Nd and Eu concentrations by at least a factor of 103. Impurity segregation coeffi...
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Application of X-Ray Topography to the Characterization of Semiconductor Surface Layers
Many of the physical properties of solids depend to a significant extent on the perfection of the surface-layer structure, and x-ray studies provide valuable information about structural perfection both in bul...