Computer Science
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992gecoa..56..689k&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 56, Issue 2, pp.689-699
Computer Science
9
Scientific paper
The temperature-dependent thermal expansivities of melts along the join anorthite-diopside have been determined on glassy and liquid samples using a combination of calorimetry, dilatometry, and Pt double bob Archimedean densitometry. Supercooled liquid volumes and molar thermal expansivities were determined using scanning calorimetric and dilatometric measurements of properties in the glass region and their behavior at the glass transition. The extraction of low-temperature liquid molar expansivities from dilatometry /calorimetry is based on an assumed equivalence of the relaxation of volume and enthalpy at the glass transition using a method developed and tested by et al. (1992). This method corrects for transient effects at the glass transition which can lead to serious overestimates of liquid thermal expansivity from "peak" values. Superliquidus volumes were determined using double Pt bob Archimedean densitometry at temperatures up to 1650°C. The resulting data for liquid volumes near glass transition temperatures (810-920°C) and at superliquidus temperatures (1400-1650°C) are combined to yield thermal expansivities over the entire supercooled and stable liquid range. The molar expansivities are, in general, temperature dependent. The temperature-dependence of thermal expansivity increases from anorthite to diopside composition. The thermal expansivity of anorthite is essentially temperature independent, whereas that of diopside decreases by 50% between 800 and 1500°C, with the consequence that the thermal expansivities of the liquids in the anorthite-diopside system converge at high temperature.
Dingwell Donald B.
Knoche Richard
Webb Sharon L.
No associations
LandOfFree
Temperature-dependent thermal expansivities of silicate melts: The system anorthite-diopside does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Temperature-dependent thermal expansivities of silicate melts: The system anorthite-diopside, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature-dependent thermal expansivities of silicate melts: The system anorthite-diopside will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1047449