Computer Science
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gecoa..55.2811k&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 55, Issue 10, pp.2811-2817
Computer Science
3
Scientific paper
The liquidus relations in the system NaCl-H 2 O were investigated between 300 and 925°C and between 0.4 and 6 kbar for compositions between 27.6 and 100 mol% NaCl by high-pressure differential thermal analysis. The PT slope of the liquidus increases from 10.5°C/kbar for a composition with 27.6 mol% NaCl to 20.8°C/kbar with 90 mol% NaCl to 21.8°C/kbar with pure NaCl. The PT slope of the vapor saturation surface at the composition with 27.6 mol% NaCl is linear over the pressure range investigated and has a slope of 294°C/kbar. On the basis of the experiments the composition of the liquids along the NaCl-rich part of the three-phase assemblage halite + liquid + vapor was determined: the liquid composition varies nearly linearly to within ±0.5 wt% NaCl at temperatures above 480°C, following the expression wt% ( NaCl ) = 0.1412 T (° C ) -12.96.
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