1962

Indirect calculation of the partial free energy of albite and orthoclase in alkali feldspar

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Forelesninger holdt ved Advanced Study Institute of Feldspar - Oslo 1962

Lectures held at Advanced Study Institute of Feldspar - Oslo 1962

Orville in his thesis "Alkali ion exchange between vapor and feidspar phases" [2] suggests a method for calculating the partial molar free energy of the pure alkali phases in the mixed crystal region. Orville studied the equilibrium of solubility of K + and Na+ in a vapor phase and in the alkali feldspar crystals; the vapor phase consisted of a 2- *n* solution of KCl and NaCl with different ratios of K and Na. The results for different temperatures at 2000 bars are given in Figure 3 of his paper in this volume (page FFF).

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