Pressure dependence of the elastic constants of ice Ih to 2.8 kbar by Brillouin spectroscopy

Gagnon, R.; Kiefte, H.; Clouter, M. J.; Whalley, E.

doi:10.1063/1.454792

Cited by 90 publications

(84 citation statements)

References 11 publications

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“…Pure dioctyl sebacate was initially used as the hydraulic fluid. However, contrary to previous claims that the fluid remains clear to −35°C and 300 MPa, 8 we found pure dioctyl sebacate clouded below ϳ10°C at the lowest pressures employed ͑50 MPa͒. This may have been due to the presence of the silicone, which was found to gel irreversibly at moderate pressures, and at the lowest pressure at temperatures below the freezing point of water.…”

Section: E Hydraulic Fluidcontrasting

confidence: 85%

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The simulator for icy world interiors: A 700 MPa pressure system for impulsive stimulated scattering and other optical measurements, with thermal control from −20 to 100 °C

Vance

Brown

2008

Review of Scientific Instruments

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The simulator for icy world interiors (SIWI) was developed for sound velocity measurements in simulated extraterrestrial ocean materials by the method of impulsive stimulated scattering (ISS). The design and operation of SIWI are described. Optical measurements at low temperature in corrosive solution were enabled by enclosing sample fluid in a stoppered spectrophotometric cuvette. To maintain minimum optical density it was necessary to limit contact of the dioctyl sebacate hydraulic fluid with nitrile o-rings, which caused discoloring enhanced absorption of the 532 nm ISS probe pulses. Dilution of hydraulic fluid with kerosene in the amount of 5% by volume prevented clouding at high pressures and at low temperatures. Pure kerosene was found to attenuate the ISS signal, and so was deemed unsatisfactory at low temperatures where the lower thermal expansion of water leads to weaker density contrasts between heated and unheated regions in the sample fluid. When 50 cS silicone oil was used as a hydraulic medium, clouding was observed at pressures above 400 MPa when temperatures were raised above approximately 50 degrees C and lowered to less than approximately 10 degrees C. To our knowledge, such clouding has not been reported previously for dioctyl sebacate, nor for silicone at such low pressures.

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Section: E Hydraulic Fluidcontrasting

confidence: 85%

“…7 observed that DOS remained clear to −35°C and 300 MPa. 8 We found dioctyl sebacate alone clouded below ϳ10°C at the lowest pressures employed ͑50 MPa͒. This may have been due to the presence of the silicone grease used to seal the sample cuvette.…”

Section: Maintaining An Optically Neutral Pressure Mediummentioning

confidence: 94%

The simulator for icy world interiors: A 700 MPa pressure system for impulsive stimulated scattering and other optical measurements, with thermal control from −20 to 100 °C

Vance

Brown

2008

Review of Scientific Instruments

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“…For this pressure range we assume a linear P-V relationship and B 0 0 is fixed at 4. The fitting results shows that the unit cell volume for Ar filled-ice at zero pressure (V 0 ) should be around 317 Å 3 , and the bulk modulus at zero pressure (B 0 )i s 11.7 ± 0.4 GPa, which is greater than that of ice-Ih (8.97 GPa [29]). Previously, the bulk modulus of methane filled-ice was calculated by Hirai et al [27] (15.4 GPa) and Loveday et al [30] (15.2 GPa).…”

Section: Resultsmentioning

confidence: 99%

Guest disorder and high pressure behavior of argon hydrates

Yang

Tulk

Klug

et al. 2010

Chemical Physics Letters

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The structure of argon hydrate was studied at ambient pressure and low temperature, and between 1.7 and 4.2 GPa at 295 K. This analysis produced a single Ar guest atom, positionally disordered off-center in the large cages of sII. Above 1.7 GPa Ar clathrate transformed to a mixture of a body-centered orthorhombic filled-ice phase, which can be viewed as a polytype of ice-Ih, and high pressure forms of pure ice. The guest disorder is further substantiated by analysis of the guest to host ratio in this high pressure filled-ice structure. The bulk modulus of Ar filled-ice found to be 11.7 ± 0.4 GPa.

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“…Published data on ice compressibility vary up to a factor of 3.6 between different authors. In TEOS-10, the related uncertainty of mechanical measurements could be reduced by a factor of 100 to about 1 % Wagner, 2004, 2005) using crystallographic spectroscopy data (Gammon et al, 1980Gagnon et al, 1988); see Fig. 2.…”

Section: Gibbs Function Of Ice Ihmentioning

confidence: 99%

Thermodynamic properties of seawater, ice and humid air: TEOS-10, before and beyond

Feistel

2018

Ocean Sci.

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Abstract. In the terrestrial climate system, water is a key player in the form of its different ambient phases of ice, liquid and vapour, admixed with sea salt in the ocean and with dry air in the atmosphere. For proper balances of climatic energy and entropy fluxes in models and observations, a highly accurate, consistent and comprehensive thermodynamic standard framework is requisite in geophysics and climate research. The new Thermodynamic Equation of Seawater -2010 (TEOS-10) constitutes such a standard for properties of water in its various manifestations in the hydrological cycle.

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Pressure dependence of the elastic constants of ice Ih to 2.8 kbar by Brillouin spectroscopy

Cited by 90 publications

References 11 publications

The simulator for icy world interiors: A 700 MPa pressure system for impulsive stimulated scattering and other optical measurements, with thermal control from −20 to 100 °C

The simulator for icy world interiors: A 700 MPa pressure system for impulsive stimulated scattering and other optical measurements, with thermal control from −20 to 100 °C

Guest disorder and high pressure behavior of argon hydrates

Thermodynamic properties of seawater, ice and humid air: TEOS-10, before and beyond

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