Entropy dependence of viscosity and the glass-transition temperature of melts in the system diopside-anorthite
Article Abstract:
Diopside-anorthite melt viscosity was measured at varying temperature and pressure regimes to determine the entropy dependence of the glass-transition temperature and viscosity. Interpretation of results was made using the configurational entropy theory to take into account temperature and viscosity effects. The configurational entropies of magmatic silicates at glass-transition temperature was almost constant using average molecular weight. The negative deviation of the same values for intermediate melts from linearity was explained as the result of the mixing entropy.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1992
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Dehydration and partial melting of tremolitic amphibole coexisting with zoisite, quartz, anorthite, diopside, and water in the system H20-CaO-MgO-Al2O3-SiO2
Article Abstract:
Research was conducted to examine the greenchist to amphibolite transition in two reactions involving zoisite, quartz, tremolite, anorthite, diopside and water in the chemical system H20-CaO-MgO-Al2O3-SiO2. Experimental results from reaction one showed a good agreement between the experimentally determined and theoretically-calculated position in pressure-temperature space. Compositional re-equilibrium results from reaction two showed a low Al content of termolitic amphibole coexisting with zoisite, quartz, diopside and water in the chemical system.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1998
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Non-linear temperature dependence of liquid volumes in the system albite-anorthite-diopside
Article Abstract:
Research describing the temperature-dependent thermal expansitivities of glasses and liquids in the ternary albite-anorthite-diopside is presented. Calorimetry, dilatometry, and Pt and Ir double bob Archimedean densitometry were applied to measure the given liquid's properties. Temperature-dependent thermal expansitivities or non-linear temperature dependence of molar volume were observed as glass transition and superliquids temperatures of liquid volumes were approached.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1992
User Contributions:
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