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Kinetics of phase formation upon the treatment of La2(SO4)3 and La2O2SO4 in a hydrogen flow

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Abstract

The sequence of phases occurring during treatment of lanthanum sulfate, La2(SO4)3 and lanthanum oxysulfate, La2O2SO4 in a hydrogen flow is established. The temperature ranges in which homogeneous La2O2S is produced are revealed: when La2(SO4)3 is a precursor, the range is 770–1220 K; in the case of La2O2SO4, the interval is 950–1220 K. The kinetic curves showing the time dependence of the yield of La2O2S is constructed and treated using the Avrami-Erofeev and contracting volume equations. The activation energies of the reactions are determined.

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Authors and Affiliations

  1. Tyumen State University, Tyumen, 625026, Russia

    E. I. Sal’nikova, D. I. Kaliev & P. O. Andreev

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  1. E. I. Sal’nikova
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  2. D. I. Kaliev
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  3. P. O. Andreev
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Correspondence to E. I. Sal’nikova.

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Original Russian Text © E.I. Sal’nikova, D.I. Kaliev, P.O. Andreev, 2011, published in Zhurnal Fizicheskoi Khimii, 2011, Vol. 85, No. 12, pp. 2273–2277.

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Sal’nikova, E.I., Kaliev, D.I. & Andreev, P.O. Kinetics of phase formation upon the treatment of La2(SO4)3 and La2O2SO4 in a hydrogen flow. Russ. J. Phys. Chem. 85, 2121–2125 (2011). https://doi.org/10.1134/S0036024411120296

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  • DOI: https://doi.org/10.1134/S0036024411120296

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