Date of Award

Spring 5-15-1962

Degree Type

Bachelors Thesis

Degree Name

Bachelor of Science in Metallurgical Engineering


Metallurgical Engineering

First Advisor

Dr. Walter C. Hahn, Jr.


All single crystals have a particular habit or morphology. The crystal habit refers to the relative degree of development of crystallographic planes into surfaces which make up the external appearance of the single crystal.

In this paper, NaClO3 is used as a parent crystal. Its simple cubic habit is modified to tetrahedral by the use of impurities of SO4=, S2O3=, Cr2O7=, and NO3-. The degree of habit change is studied as a function of impurity concentration and temperature. The problem and phenomena are explained in terms of surface chemistry and thermodynamics.