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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 48 (1964)

Issue: 4. (April)

First Page: 536

Last Page: 536

Title: Critical Analysis of the Gladstone-Dale Rule and Its Constants: ABSTRACT

Author(s): J. A. Mandarino

Article Type: Meeting abstract


The Gladstone-Dale rule, which is an empirical attempt to relate chemical composition, refractive indices, and density, was applied to minerals by Larsen in 1934. In 1956, Jaffe offered some corrections and additions to Larsen's original constants.

While applying the Gladstone-Dale relationship to some tellurites and selenites this writer found that Larsen's constants for TeO2 and SeO2 required revision. Furthermore, the value of these constants, as well as those for many other oxide components, varied widely, depending on the particular compounds used to calculate them.

Values of k for various oxide components are given here, using Larsen's form of the Gladstone-Dale equation:


In this equation, n is the average index of refraction, d is the density, k is the specific refractive energy for a particular oxide component, and p is the weight percentage of the component.


Users of the Gladstone-Dale relationship should realize that wide differences between calculated and observed refractive indices and densities may be caused by the variation in k values.

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Copyright 1997 American Association of Petroleum Geologists