Elastic constants determined from drawn wires are of considerable practical use, but they are not very illuminating on the subject of the structure of matter. A drawn wire is a heterogeneous mass of matter in crystalline and amorphous states, with never any regularity in composition or of crystalline structure. In fact the elastic constants so determined are not so much characteristic of the substance, say copper, as of the particular physical state of that substance. If, however, one could employ an isolated crystal of a simple elementary substance, he ought to be able to determine the elastic constants of the substance itself, rather than that of its particular physical state.
Proceedings of the Iowa Academy of Science
©1921 Iowa Academy of Science, Inc.
Sieg, L. P. and Miller, R. F.
"The Coefficient of Simple Rigidity and Young's Modulus for Hexagonal Crystals of Selenium,"
Proceedings of the Iowa Academy of Science, 28(1), 103-111.
Available at: https://scholarworks.uni.edu/pias/vol28/iss1/20