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Record Details

Record 95 of 16075
The solubility of gold in silicate melts: First results
Author and Affiliation:
Borisov, A.(Max-Planck-Inst. fuer Chemie, Mainz, Germany)
Palme, H.(Max-Planck-Inst. fuer Chemie, Mainz, Germany)
Spettel, B.(Max-Planck-Inst. fuer Chemie, Mainz, Germany)
Abstract: The effects of oxygen fugacity and temperature on the solubility of Au in silicate melts were determined. Pd-Au alloys were equilibrated with silicate of anorthite-diopside eutectic composition at different T-fO2 conditions. The behavior of Au was found to be similar to that of Pd reported recently. Au solubilities for alloys with 30 to 40 at. percent Au decrease at 1400 C from 12 ppm in air to 160 ppb at a log fO2 = -8.7. The slope of the log(Me-solubility) vs. log(fO2) curve is close to 1/4 for Au and the simultaneously determined Pd suggesting a formal valence of Au and Pd of 1+. Near the IW buffer Pd and Au solubilities become even less dependent on fO2 perhaps reflecting the presence of some metallic Au and Pd.
Publication Date: Jan 01, 1993
Document ID:
19940007614
(Acquired Dec 28, 1995)
Accession Number: 94N12086
Subject Category: METALLIC MATERIALS
Coverage: Abstract Only
Document Type: Conference Paper
Publication Information: Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F; p 147-148
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Max-Planck-Inst. fuer Chemie; Mainz, Germany
Description: 2p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: GOLD; MELTS (CRYSTAL GROWTH); SILICATES; SOLUBILITY; EUTECTICS; OXYGEN
Imprint And Other Notes: In Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F p 147-148 (SEE N94-12015 01-91)
Availability Source: Other Sources
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