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Title: The Solubility of Tugarinovite (MoO 2) in H 2O at Elevated Temperatures and Pressures

Abstract

The solubility of tugarinovite (MoO 2) in pure water was investigated at temperatures between 400 and 800°C and at pressures ranging between 95 and 480 MPa by using in situ synchrotron X-ray fluorescence (SXRF) to separately analyze high temperature aqueous solutions in a hydrothermal diamond anvil cell (HDAC). The concentration of molybdenum in the fluid at 400 and 500°C was below detection; however, at temperatures between 600 and 800°C, the solubility of tugarinovite increased with increasing temperature by two orders of magnitude. The molybdenum concentration at 600°C and 800°C is 44 ppm and 658 ppm, respectively. The results complement the data of Kudrin (1985) and provide the first measurement of MoO 2solubility at pressure and temperature conditions comparable to intrusion-related Mo deposit formation. The data are also relevant to the study of water chemistry and corrosion product transport in supercritical-water-cooled reactors, where Mo-bearing steel alloys interact with aqueous solutions at temperatures greater than 600°C. The application of in situ SXRF to solubility measurements of sparingly soluble minerals is recommended because it circumvents analytical uncertainties inherent in determinations obtained by quenching and weight loss measurements.

Authors:
ORCiD logo [1];  [1];  [1];  [2]
  1. Department of Earth Sciences, St. Francis Xavier University, Antigonish, NS, Canada B2G 2W5
  2. Experimentalphysik II, Institut für Physik, Universität Augsburg, 86135 Augsburg, Germany
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
FOREIGN
OSTI Identifier:
1414461
Resource Type:
Journal Article
Resource Relation:
Journal Name: Geofluids; Journal Volume: 2017; Journal Issue: 2017
Country of Publication:
United States
Language:
ENGLISH

Citation Formats

Saha, Pritam, Anderson, Alan J., Lee, Thomas, and Klemm, Matthias. The Solubility of Tugarinovite (MoO2) in H2O at Elevated Temperatures and Pressures. United States: N. p., 2017. Web. doi:10.1155/2017/5459639.
Saha, Pritam, Anderson, Alan J., Lee, Thomas, & Klemm, Matthias. The Solubility of Tugarinovite (MoO2) in H2O at Elevated Temperatures and Pressures. United States. doi:10.1155/2017/5459639.
Saha, Pritam, Anderson, Alan J., Lee, Thomas, and Klemm, Matthias. Mon . "The Solubility of Tugarinovite (MoO2) in H2O at Elevated Temperatures and Pressures". United States. doi:10.1155/2017/5459639.
@article{osti_1414461,
title = {The Solubility of Tugarinovite (MoO2) in H2O at Elevated Temperatures and Pressures},
author = {Saha, Pritam and Anderson, Alan J. and Lee, Thomas and Klemm, Matthias},
abstractNote = {The solubility of tugarinovite (MoO2) in pure water was investigated at temperatures between 400 and 800°C and at pressures ranging between 95 and 480 MPa by using in situ synchrotron X-ray fluorescence (SXRF) to separately analyze high temperature aqueous solutions in a hydrothermal diamond anvil cell (HDAC). The concentration of molybdenum in the fluid at 400 and 500°C was below detection; however, at temperatures between 600 and 800°C, the solubility of tugarinovite increased with increasing temperature by two orders of magnitude. The molybdenum concentration at 600°C and 800°C is 44 ppm and 658 ppm, respectively. The results complement the data of Kudrin (1985) and provide the first measurement of MoO2solubility at pressure and temperature conditions comparable to intrusion-related Mo deposit formation. The data are also relevant to the study of water chemistry and corrosion product transport in supercritical-water-cooled reactors, where Mo-bearing steel alloys interact with aqueous solutions at temperatures greater than 600°C. The application of in situ SXRF to solubility measurements of sparingly soluble minerals is recommended because it circumvents analytical uncertainties inherent in determinations obtained by quenching and weight loss measurements.},
doi = {10.1155/2017/5459639},
journal = {Geofluids},
number = 2017,
volume = 2017,
place = {United States},
year = {Mon Dec 18 00:00:00 EST 2017},
month = {Mon Dec 18 00:00:00 EST 2017}
}