Determination of the partial molar volume of SiO 2 in silicate liquids at elevated pressures and temperatures: a new experimental approach

Details Determination of the partial molar volume of SiO 2 in silicate liquids at elevated pressures and temperatures: a new experimental approach Determination of the partial molar volume of SiO 2 in silicate liquids at elevated pressures and temperatures: a new experimental approach

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998gecoa..62.2499g&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 62, Issue 14, pp.2499-2508

Other

10

Scientific paper

This study presents a new approach for determining the partial molar volume and its pressure derivative for a silicate liquid component through an experimental determination of the isothermal pressure dependence of the solubility in the liquid of a crystalline phase having the composition of the component. Because this approach allows the determination of partial molar volumes of liquid components at elevated pressure, it has the potential to detect pressure-induced structural changes associated with particular components in silicate liquid through their influence on partial molar volumes. To illustrate the approach, an experimental determination of the solubility of quartz in a rhyolitic liquid was used to determine the partial molar volume of SiO 2 at pressures up to 35 kbar and a temperature of 1350°C. The 1 bar partial molar volume for SiO 2 determined in this way, 2.635 ± 0.009 J/bar, is slightly smaller than the 2.690 ± 0.006 J/bar determined by (all uncertainties are 1 ). The isothermal pressure dependence of the partial molar volume of SiO 2 at 10 to 35 kbar (-8.69 × 10 -6 ± 6.1 × 10 -7 J/bar 2 ) is approximately one-half of the value determined by at 1 bar (-1.96 × 10 -5 ± 0.2 × 10 -6 J/bar 2 ). Our high pressure determination can be reconciled with the existing 1 bar volume and compressibility data if the isothermal pressure dependence of the partial molar volume of SiO 2 in silicate liquids decreases rapidly between 1 bar and 10 kbar, then remains approximately constant to at least 35 kbar.

Affiliated with

Also associated with

No associations

Rating

Determination of the partial molar volume of SiO 2 in silicate liquids at elevated pressures and temperatures: a new experimental approach 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 Determination of the partial molar volume of SiO 2 in silicate liquids at elevated pressures and temperatures: a new experimental approach, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determination of the partial molar volume of SiO 2 in silicate liquids at elevated pressures and temperatures: a new experimental approach will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1345543