Acoustic velocities and densities of polycrystalline ice Ih, II, III, V, and VI by Brillouin spectroscopy

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

doi:10.1063/1.458021

Cited by 88 publications

(84 citation statements)

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“…A comparison between compressibility values calculated from our experimental data (Table 2) and measured in experiments with different ice samples [56] shows that values of bulk modulus at given pressures for hydrates are close to those of low-pressure ices (Figure 3), but lower than the values for high-pressure ice VI at the same pressure. For the situation where guest molecules keep rotational freedom in the hydrate cage, hydrogen bonds are the most probable interactions to withstand compression of the hydrate framework.…”

mentioning

confidence: 49%

Compressibility of Gas Hydrates

Manakov¹,

Likhacheva²,

Потемкин³

et al. 2011

ChemPhysChem

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Experimental data on the pressure dependence of unit cell parameters for the gas hydrates of ethane (cubic structure I, pressure range 0-2 GPa), xenon (cubic structure I, pressure range 0-1.5 GPa) and the double hydrate of tetrahydrofuran+xenon (cubic structure II, pressure range 0-3 GPa) are presented. Approximation of the data using the cubic Birch-Murnaghan equation, P=1.5B(0)[(V(0)/V)(7/3)-(V(0)/V)(5/3)], gave the following results: for ethane hydrate V(0)=1781 Å(3) , B(0)=11.2 GPa; for xenon hydrate V(0)=1726 Å(3) , B(0)=9.3 GPa; for the double hydrate of tetrahydrofuran+xenon V(0)=5323 Å(3) , B(0)=8.8 GPa. In the last case, the approximation was performed within the pressure range 0-1.5 GPa; it is impossible to describe the results within a broader pressure range using the cubic Birch-Murnaghan equation. At the maximum pressure of the existence of the double hydrate of tetrahydrofuran+xenon (3.1 GPa), the unit cell volume was 86% of the unit cell volume at zero pressure. Analysis of the experimental data obtained by us and data available from the literature showed that 1) the bulk modulus of gas hydrates with classical polyhedral structures, in most cases, are close to each other and 2) the bulk modulus is mainly determined by the elasticity of the hydrogen-bonded water framework. Variable filling of the cavities with guest molecules also has a substantial effect on the bulk modulus. On the basis of the obtained results, we concluded that the bulk modulus of gas hydrates with classical polyhedral structures and existing at pressures up to 1.5 GPa was equal to (9±2) GPa. In cases when data on the equations of state for the hydrates were unavailable, the indicated values may be recommended as the most probable ones.

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confidence: 49%

Compressibility of Gas Hydrates

Manakov¹,

Likhacheva²,

Потемкин³

et al. 2011

ChemPhysChem

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“…However, measurements of the elastic properties of the high pressure phases of ice have been limited to the bulk elastic properties ͑such as the bulk modulus, Young's modulus, and the average acoustic velocity͒ of polycrystalline specimens using both ultrasonic 14 and Brillouin spectroscopic techniques. 15,16 Constant-pressure values for the elastic constants of ice III, V, and VI have previously been reported by this laboratory. 17,18 In the present paper the pressure variation of the elastic constants of ice III at Ϫ20°C and ice VI at Ϫ2°C are given.…”

Section: Introductionmentioning

confidence: 72%

“…Density values for several high pressure phases of ice III have been found by Gagnon et al 15 at Ϫ35°C by directly measuring the volume change of ice specimens as a function of applied hydrostatic pressure. A linear fit to these data yielded the result…”

Section: Ice IIImentioning

confidence: 97%

The pressure dependence of the elastic constants of ice III and ice VI

Tulk

Gagnon²,

Kiefte

et al. 1997

The Journal of Chemical Physics

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“…In a laboratory study on ice, Sato and Wakahama (1980) obtained a maximum velocity of 1060 m/s. The theoretical limiting velocity of crack propagation is about 0.38 that of the longitudinal waves (Broek 1986), which, for ice (Gagnon et al 1990), would be about 1500 m/s. Therefore, 200 m/s is far below the limiting velocity in ice.…”

Section: Fracture Toughness Of Ice-wedge Icementioning

confidence: 99%

The sound and speed of ice-wedge cracking, Arctic Canada

Mackay¹

1993

Can. J. Earth Sci.

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Rifle-like sounds produced by ice-wedge cracking, although seldom heard, have been reported in the permafrost literature for a century. The sounds, similar to those produced by the rapid cracking of lake ice, indicate a high speed of crack propagation. The speed of ice-wedge crack propagation has been measured at two field sites for the 1966-1989 period. No evidence of rapid crack propagation has been detected at these sites. The fracture patterns of ribs, as seen on vertical crack faces, and the numerous short interacting cracks, as seen in plan view, suggest slow rates of cracking. Enquiries made of many northern residents indicate that rifle-like sounds are uncommon along the mainland coast from the Alaska-Yukon boundary eastward to Coppermine, N.W.T. but are heard more frequently in the Arctic islands. High speeds of crack propagation appear associated with sharp drops in temperature, windblown sites, and long, straight ice wedges. As a preliminary estimate, crack propagation rates exceeding about 200 rnls are necessary to produce rifle-like sounds and accompanying ground tremors.Des sons ressemblant i des tirs de fusil sont produits par le fendillement de coin de glace, quoique rarement entendus, ils ont kt6 mentionnts dans la litttrature sur le pergelis01 depuis un sikcle. Ces sons, qui sont analogues B ceux produits par le fendillement rapide de la glace de lac, indiquent une trks grande vitesse de propagation des fentes. La vitesse de propagation des fentes dans les coins de glace a t t t mesuree sur le terrain, i deux emplacements, durant la pkriode de 1966 2 1989. Aucune indication d'une propagation rapide des fentes n'a pu Ctre dktectee sur ces emplacements. La distribution des nervures de fendillement observte sur les faces verticales des fissures et les nombreuses petites fentes interactives, telles que vues en plan, suggtrent des taux de fendillement lents. Les demandes de renseignements faites par plusieurs residants dans les regions nordiques revklent que les sont imitant les tirs de fusil ne sont pas frequents le long de c6te de la terre ferme, allant de la frontikre Alaska-Yukon vers I'est jusqu'8 Coppermine, T.N.-O., cependant, ils sont entendus plus frequemment dans les iles de I'Arctique. Les grandes vitesses de propagation de fentes semblent Ctre associees : a des baisses subites de tempkrature, aux sites exposes aux grands vents, et aux coins de glace droits et longs. A titre d'estimation preliminaire, des taux de propagation de fentes excedant 200 rnls sont necessaires pour produire des sons imitant les tirs de fusils et les trCmoussements du sol associks.

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Acoustic velocities and densities of polycrystalline ice Ih, II, III, V, and VI by Brillouin spectroscopy

Cited by 88 publications

References 15 publications

Compressibility of Gas Hydrates

Compressibility of Gas Hydrates

The pressure dependence of the elastic constants of ice III and ice VI

The sound and speed of ice-wedge cracking, Arctic Canada

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