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.

Influence, Viscosity, Entropy (Physics), Entropy (Thermodynamics), Plagioclase, Pyroxene

---

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.

Minerals, Minerals (Geology), Quartz

---

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.

Liquids, Expansion (Heat), Thermal expansion, Properties

Similar abstracts:

• Abstracts: Neodymium isotopic evidence for the tectonic assembly of late Archean crust in the Slave Province, northwest Canada
• Abstracts: Discussion on vitrinite reflectivity and the structure and burial history of the Old Red Sandstone of the Midland Valley
• Abstracts: Late orogenic extension of the Betic Cordillera and the Alboran Domain: a lithospheric view. Comment on "Alternating contractional and extensional events in the Alpujarride nappes of the Alboran Domain (Betics, Gibraltar Arc)" by Juan C. Balanya et al
• Abstracts: Fragmentation processes and xenolith transport in a Proterozoic minette dyke, Grenville Province, Quebec. Coexisting K-rich alkaline and shoshonitic magmatism of arc affinities in the Proterozoic: a reassessment of syenitic stocks in the southwestern Grenville Province
• Abstracts: Determination of time-integrated metamorphic fluid fluxes from the reaction progress of multivariant assemblages

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.