Thermodynamic mixing behavior of synthetic Ca-Tschermak-diopside pyroxene solid solutions: II. Heat of mixing and activity-composition relationships

Benisek, Artur, Etzel, Katja and Cemic, L. (2007) Thermodynamic mixing behavior of synthetic Ca-Tschermak-diopside pyroxene solid solutions: II. Heat of mixing and activity-composition relationships Physics and Chemistry of Minerals, 34 (10). pp. 747-755. DOI 10.1007/s00269-007-0192-4.

Full text not available from this repository.

Supplementary data:

Abstract

The heat of mixing for the binary solid solution diopside-Ca-Tschermak was investigated at T = 980 K by lead borate solution calorimetry. A new statistical technique was applied to overcome the problem of using experimental data of various precisions. A two-parameter Margules model was fitted to the calorimetric data leading to W-CaTs-Di(H) = 31.3 +/- 3.4 kJ mol(-1) and W-Di-CaTs(H) = 2.4 +/- a4.3 kJ mol(-1). The results are in good agreement with calorimetric data given in the literature. They agree also with enthalpy data that were extracted from phase equilibrium experiments. With configurational entropy values taken from the literature, the volume and the vibrational entropy, presented in Part I of this work, and the enthalpy data of this study, the activity-composition relationships of the diopside-Ca-Tschermak binary were calculated.

Document Type: Article
Keywords: clinopyroxene geobarometry magmatic rocks stability systems
Research affiliation: Kiel University
DOI etc.: 10.1007/s00269-007-0192-4
ISSN: 0342-1791
Date Deposited: 12 Jan 2012 06:06
Last Modified: 08 Oct 2012 10:20
URI: http://eprints.uni-kiel.de/id/eprint/15894

Actions (login required)

View Item View Item