MINERAL DIELECTRIC CONSTANTS AND THE OXIDE ADDITIVITY RULE

R. D. Shannon, M. A. Subramanian
Central Res. Dept., Experimental Station, E. I. Du Pont de Nemours i Co.,
Inc., Wilmington, DE 10880-0356 Contrib. No. 5108

A. N. Mariano
48 Page Brook Rd., Carlisle, MA 01741

G. R. Rossman
Div. Geol. Planetary Sci., Calif. Inst. Tech., Pasadena, CA 01125

ABSTRACT

The 1 KHz dielectric constants of a variety of synthetic aluminate garnets: Y3Al2O12 , Ho3Al5O12 , Y2.93Nd.07Sc2Al3O12 and Gd2.95Nd0.05Sc1.98Cr0.02Al3O2 and several silicates: CaB2Si2O5 (danburite), Ca3A12Si3O12 (grossular) and Mg2A14Si5O18 (cordierite) were determined using the two-terminal method with edge corrections. These data and polarizabilities derived from the published single crystal dielectric constants of simple oxides were used to compare compound polarizabilities obtained from the Clausius-Mosotti equation and the oxide additivity rule.


Mat. Ras. Soc. Symp. Proc. Vol. 150.