The Cleavage of Ionic Minerals. The Crystal Structure of Bixbyite and the C-Modification of the Sesquioxides

Author: Shappell, Maple Delos

Year: 1933

Degree: Dissertation (Ph.D.)

Advisor: Pauling, Linus

Committee Member: Unknown, Unknown

Option: Geology

DOI: 10.7907/PTJH-EN65

Abstract

Mineral cleavage can be resolved into two components; cleavability and optical effect. The electrical theory of matter in the solid state leads to a quantitative expression for the cleavability of ionic minerals

C{hkl} = A(hkl)/Σínisicos θ i

Approximate values for s are obtainable by using the electrostatic bond strength. Systematic application to minerals whose constituent atoms have inert-gas cores gives good agreement with observation.

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