Oxygen isotope fractionation factors involving cassiterite (SnO2): I. calculation of reduced partition function ratios from heat capacity and X-ray resonant studies

Polyakov, V. B.; Mineev, S. D.; Clayton, Robert N.; Hu, G.; Gurevich, V. M.; Khramov, D. A.; Гавричев, К. С.; Gorbunov, V. E.; Golushina, L. N.

doi:10.1016/j.gca.2004.08.034

Cited by 26 publications

(26 citation statements)

References 44 publications

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“…It is interesting to compare the method of determination of the ␤-factor using synchrotron radiation INRXS with that using traditional Mössbauer spectroscopy. We have done the comparison using results of Mössbauer spectroscopy studies of SnO 2 (Polyakov et al, 2005). The temperature dependence of the SOD shift of SnO 2 was described by Polyakov et al (2005) as a Debye function with characteristic temperature M ϭ 430 Ϯ 60 K. The Mössbauer spectroscopy derived ␤-factors are presented in Table 1 for comparison with those obtained by the INRXS in synchrotron radiation experiments.…”

Section: Discussionmentioning

confidence: 99%

“…We have done the comparison using results of Mössbauer spectroscopy studies of SnO 2 (Polyakov et al, 2005). The temperature dependence of the SOD shift of SnO 2 was described by Polyakov et al (2005) as a Debye function with characteristic temperature M ϭ 430 Ϯ 60 K. The Mössbauer spectroscopy derived ␤-factors are presented in Table 1 for comparison with those obtained by the INRXS in synchrotron radiation experiments. One can see from Table 1 that the difference between two methods is not large, but application of the synchrotron radiation provides more accurate and reliable results.…”

Section: Discussionmentioning

confidence: 99%

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Determination of tin equilibrium isotope fractionation factors from synchrotron radiation experiments

Polyakov

Mineev

Clayton

et al. 2005

Geochimica et Cosmochimica Acta

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Determination of tin equilibrium isotope fractionation factors from synchrotron radiation experiments

Polyakov

Mineev

Clayton

et al. 2005

Geochimica et Cosmochimica Acta

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“…For a compound consisting of two elements such as cementite, the β-factor of one element can be calculated from the kinetic vibration energies of the entire compound and the other element (53)(54)(55)(56):…”

Section: Methodsmentioning

confidence: 99%

Carbon-bearing iron phases and the carbon isotope composition of the deep Earth

Juske

Polyakov

2014

Proc. Natl. Acad. Sci. U.S.A.

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The carbon budget and dynamics of the Earth’s interior, including the core, are currently very poorly understood. Diamond-bearing, mantle-derived rocks show a very well defined peak at δ13C ≈ −5 ± 3‰ with a very broad distribution to lower values (∼−40‰). The processes that have produced the wide δ13C distributions to the observed low δ13C values in the deep Earth have been extensively debated, but few viable models have been proposed. Here, we present a model for understanding carbon isotope distributions within the deep Earth, involving Fe−C phases (Fe carbides and C dissolved in Fe−Ni metal). Our theoretical calculations show that Fe and Si carbides can be significantly depleted in 13C relative to other C-bearing materials even at mantle temperatures. Thus, the redox freezing and melting cycles of lithosphere via subduction upwelling in the deep Earth that involve the Fe−C phases can readily produce diamond with the observed low δ13C values. The sharp contrast in the δ13C distributions of peridotitic and eclogitic diamonds may reflect differences in their carbon cycles, controlled by the evolution of geodynamical processes around 2.5–3 Ga. Our model also predicts that the core contains C with low δ13C values and that an average δ13C value of the bulk Earth could be much lower than ∼−5‰, consistent with those of chondrites and other planetary body. The heterogeneous and depleted δ13C values of the deep Earth have implications, not only for its accretion−differentiation history but also for carbon isotope biosignatures for early life on the Earth.

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“…The inset shows relative difference between both curves Fig. 10 Temperature dependence of C p taken from literature [37] and given by our force field. The inset shows the relative difference between the curves…”

Section: Discussionmentioning

confidence: 99%

“…The resulting C p (T) dependence, together with experimental data taken from ref. [37], is shown in Fig. 10.…”

Section: Vibrational Electronic and Thermodynamic Propertiesmentioning

confidence: 99%

Ab initio parametrized polarizable force field for rutile-type SnO2

2012

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We report a new, polarizable classical force field for the rutile-type phase of SnO 2 , casserite. This force field has been parametrized using results from ab initio (density functional theory) calculations as a basis for fitting. The force field was found to provide structural, dynamical and thermodynamic properties of tin oxide that compare well with both ab initio and experimental results at ambient and high pressures.

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Oxygen isotope fractionation factors involving cassiterite (SnO2): I. calculation of reduced partition function ratios from heat capacity and X-ray resonant studies

Cited by 26 publications

References 44 publications

Determination of tin equilibrium isotope fractionation factors from synchrotron radiation experiments

Determination of tin equilibrium isotope fractionation factors from synchrotron radiation experiments

Carbon-bearing iron phases and the carbon isotope composition of the deep Earth

Ab initio parametrized polarizable force field for rutile-type SnO2

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