N
                  2
           and CO2 vibrational modes in solid nitrogen under pressure

McCluskey, M. D.; Zhuravlev, K. K.

doi:10.1063/1.1429644

Cited by 10 publications

(10 citation statements)

References 30 publications

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“…If the NH-II decomposed into liquid nitrogen and ice-VI at 1.45 GPa, the Raman spectra of nitrogen would show the small jump of 2 cm Ϫ1 at the liquid to ␤-phase transition pressure of 2.5 GPa and split into two peaks ͑2339.5 and 2345.5 cm Ϫ1 at 4.6 GPa͒ at the ␤-phase to ␦-phase transition pressure of 4.5 GPa. 27,28 However, the Raman spectra of the N 2 molecules in NH-III remained a single peak up to 6 GPa, as shown in Figs. 2 and 3.…”

Section: B High-pressure Raman Scattering Measurements Of Nitrogen Hmentioning

confidence: 93%

Microscopic observation and in situ Raman scattering studies on high-pressure phase transformations of a synthetic nitrogen hydrate

Sasaki

Hori

Kume

et al. 2003

The Journal of Chemical Physics

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Visual observations through a microscope and in situ Raman scattering measurements of a synthesized nitrogen hydrate have been performed at pressures up to 6 GPa and 296 K. High-pressure transformations have been found at 0.85 and 1.45 GPa. The cubic structure II (sII) nitrogen hydrate initially transforms to the hexagonal structure (sH) at 0.85 GPa and finally forms the orthorhombic dihydrate (sO) above 1.45 GPa. The sO phase of nitrogen hydrate exists up to at least 6 GPa. A variety of Raman spectra composed of three peaks have been sometimes observed in sII phase below 0.50 GPa, which implies that the guest nitrogen molecules doubly occupy the large hexakaidecahedron cages. Two Raman bands of the guest nitrogen vibrations with nearly equal intensities appearing in sH phase suggest that five nitrogen molecules are filling in extra large icosahedron cages.

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Section: B High-pressure Raman Scattering Measurements Of Nitrogen Hmentioning

confidence: 93%

Microscopic observation and in situ Raman scattering studies on high-pressure phase transformations of a synthetic nitrogen hydrate

Sasaki

Hori

Kume

et al. 2003

The Journal of Chemical Physics

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“…At higher pressure, the melting temperature increases. This change of behavior is due to the activation of vibrational modes (see McCluskeya and Zhuravlev, 2002) and applies to all substances. However, the particular value of pressure separating the two intervals with different behavior depends on substance.…”

Section: Candidate Atmospheric Gases For Life-hosting Sub-brown Dwarfsmentioning

confidence: 99%

“…1 of McCluskeya and Zhuravlev (2002) have been used for the melting curve of nitrogen. Also, experimental data from Larson (2003) for the melting and vaporization curve of nitrogen have been used.…”

Section: Properties Of Atmospheric Gasesmentioning

confidence: 99%

Sub-brown dwarfs as seats of life based on non-polar solvents: Thermodynamic restrictions

Badescu

2010

Planetary and Space Science

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“…Measurement data shown in Fig. 1 of McCluskeya and Zhuravlev (2002) have been used for the melting curve of nitrogen. Also, experimental data from (Larson 2003) for the melting and vaporization curve of nitrogen have been used.…”

Section: Properties Of Solventsmentioning

confidence: 99%

Thermodynamic Constrains for Life Based on Non-Aqueous Polar Solvents on Free-Floating Planets

Badescu

2010

Orig Life Evol Biosph

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Free-floating planets (FFPs) might originate either around a star or in solitary fashion. These bodies can retain molecular gases atmospheres which, upon cooling, have basal pressures of tens of bars or more. Pressure-induced opacity of these gases prevents such a body from eliminating its internal radioactive heat and its surface temperature can exceed for a long term the melting temperature of a life-supporting solvent. In this paper two non-aqueous but still polar solvents are considered: hydrogen sulfide and ammonia. Thermodynamic requirements to be fulfilled by a hypothetic gas constituent of a life-supporting FFP's atmosphere are studied. The three gases analyzed here (nitrogen, methane and ethane) are candidates. We show that bodies with ammonia oceans are possible in interstellar space. This may happen on FFPs of (significantly) smaller or larger mass than the Earth. Generally, in case of FFP smaller in size than the Earth, the atmosphere exhibits a convective layer near the surface and a radiative layer at higher altitudes while the atmosphere of FFPs larger in size than Earth does not exhibit a convective layer. The atmosphere mass of a life-hosting FFP of Earth size is two or three orders of magnitude larger than the mass of Earth atmosphere. For FFPs larger than the Earth and specific values of surface pressure and temperature, there are conditions for condensation (in the ethane atmosphere). Some arguments induce the conclusion than the associated surface pressures and temperatures should be treated with caution as appropriate life conditions.

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N 2 and CO2 vibrational modes in solid nitrogen under pressure

Cited by 10 publications

References 30 publications

Microscopic observation and in situ Raman scattering studies on high-pressure phase transformations of a synthetic nitrogen hydrate

Microscopic observation and in situ Raman scattering studies on high-pressure phase transformations of a synthetic nitrogen hydrate

Sub-brown dwarfs as seats of life based on non-polar solvents: Thermodynamic restrictions

Thermodynamic Constrains for Life Based on Non-Aqueous Polar Solvents on Free-Floating Planets

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