skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Intercomparison of the gold, platinum, and MgO pressure scales up to 140 GPa and 2500 K

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [4]
  1. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan China; School of Earth and Space Exploration, Arizona State University, Tempe Arizona USA
  2. GSECARS, University of Chicago, Chicago Illinois USA
  3. Carnegie Institute of Washington, Washington District of Columbia USA
  4. School of Earth and Space Exploration, Arizona State University, Tempe Arizona USA
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
National Science Foundation (NSF); USDOE
OSTI Identifier:
1368221
DOE Contract Number:
FG02-94ER14466; NA0001974; FG02-99ER45775
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Geophysical Research. Solid Earth; Journal Volume: 122; Journal Issue: 5
Country of Publication:
United States
Language:
ENGLISH

Citation Formats

Ye, Y., Prakapenka, V., Meng, Y., and Shim, S. -H. Intercomparison of the gold, platinum, and MgO pressure scales up to 140 GPa and 2500 K. United States: N. p., 2017. Web. doi:10.1002/2016JB013811.
Ye, Y., Prakapenka, V., Meng, Y., & Shim, S. -H. Intercomparison of the gold, platinum, and MgO pressure scales up to 140 GPa and 2500 K. United States. doi:10.1002/2016JB013811.
Ye, Y., Prakapenka, V., Meng, Y., and Shim, S. -H. Mon . "Intercomparison of the gold, platinum, and MgO pressure scales up to 140 GPa and 2500 K". United States. doi:10.1002/2016JB013811.
@article{osti_1368221,
title = {Intercomparison of the gold, platinum, and MgO pressure scales up to 140 GPa and 2500 K},
author = {Ye, Y. and Prakapenka, V. and Meng, Y. and Shim, S. -H.},
abstractNote = {},
doi = {10.1002/2016JB013811},
journal = {Journal of Geophysical Research. Solid Earth},
number = 5,
volume = 122,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2017},
month = {Mon May 01 00:00:00 EDT 2017}
}
  • Cited by 1
  • The pressure-induced frequency shift of the Sm:YAG {ital Y}1 peak at elevated temperature is calibrated against the temperature-corrected Raman shift of the nitrogen vibron and, at temperatures less than 673 K, the {ital R}1 shift of ruby. The results presented here indicate that pressure can be determined from the {ital Y}1 and {ital Y}2 peak frequencies, without temperature correction, from 6 to 820 K and from 1 bar to 25 GPa by using the equations: {ital P}(GPa) ={minus}0.12204 ({omega}{sup {ital Y}1}{sub obs}{minus}16187.2) and {ital P}(GPa)={minus}0.15188 ({omega}{sup {ital Y}2}{sub obs}{minus}16232.2). However, pressure determinations based on {ital Y}2 are less accurate, especiallymore » at high temperature. At elevated temperature, the Sm:YAG {ital Y}1 and {ital Y}2 peak frequencies are most accurately determined by curve fitting a spectral window at least 400 cm{sup {minus}1} wide. The spectral range was chosen in order to include the decay of the intensity of the Lorentzian {ital Y}1 peak to a background value and incorporate a third peak at 16360 cm{sup {minus}1}.« less
  • We performed the single-crystal X-ray diffraction study of a perovskite-type gold mixed-valence compound, Cs{sub 2}Au{sup I}Au{sup III}Cl{sub 6}, under high pressures up to 18 GPa by using a diamond-anvil-cell with helium gas as an ideal hydrostatic pressure-transmitting medium. The lattice parameters and the variable atomic positional parameters were obtained with reasonable accuracy at various pressures. A structural phase transition at ca. 12.5 GPa from I4/mmm to Pm3m was found. The lattice parameters a {sub 0} and c {sub 0}, denoted in the tetragonal cell setting, result in the relationship 2{sup 1/2} a {sub 0}=c {sub 0}, and the superstructure reflectionsmore » h k l (l is odd), caused by the shift of the Cl ions from the midpoint of the Au ions, disappeared at pressures above the phase transition. Both elongated [Au{sup III}Cl{sub 6}] and compressed [Au{sup I}Cl{sub 6}] octahedra in the low-pressure phase smoothly approach regular octahedra with increasing pressure. Above the structural phase transition at 12.5 GPa, all the [AuCl{sub 6}] octahedra are crystallographically equivalent, which shows that the tetragonal-to-cubic phase transition accompanies the valence transition from the Au{sup I}/Au{sup III} mixed-valence state to the Au{sup II} single-valence state. - Graphical abstract: Single-crystal X-ray diffraction study under high pressures up to 18 GPa by using a diamond-anvil-cell with helium gas as an ideal hydrostatic pressure medium has revealed that a perovskite-type gold mixed-valence compound, Cs{sub 2}Au{sup I}Au{sup III}Cl{sub 6}, exhibits the structural phase transition from tetragonal to cubic at 12.5 GPa accompanying gold valence transition.« less
  • The effect of a high hydrostatic pressure of up to 1 GPa on the electrical resistance of platinum in the 20-100{degrees}C temperature range is investigated. An approximate formula is proposed for correcting the readings of platinum resistance thermometers used in a medium under high hydrostatic pressures.
  • In comparing an unsymmetric stabilized cell for measuring the electrical conductivity based on a continuous capillary made of BeO with an inner ring-shaped cavity with symmetric unstabilized cells with large volumes of a temperature-stabilized material, the characteristic features of the axial and radial migration of impurities in the insulator envelopes at high temperatures and pressures are studied. The advantages of the proposed cells, associated with the reduced danger and probability of seal failure and contamination of the substance studied, determining the accuracy of the measurements, are pointed out. The results of measurements of the electrical conductivity of pure mercury inmore » the allowed pressure and temperature ranges, obtained in the cells with improved insulating properties of the ceramic, are presented.« less