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The Relationship Between Activities of Divalent Cation Oxides and the Solution of Sulfide in Silicate and Aluminosilicate Liquids

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Physical Chemistry of Magmas

Part of the book series: Advances in Physical Geochemistry ((PHYSICAL GEOCHE,volume 9))

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Abstract

At oxygen fugacities below those of approximately the nickel-nickel oxide buffer sulfur dissolves in silicate and aluminosilicate liquids by the gas-melt anion exchange reaction,

$$ {O^{2 - }}_{melt} + 0.5{S_{2gas}} = {S^{2 - }}_{melt} + 0.5{O_{2gas}} $$
(1)

(Fincham and Richardson, 1954; Richardson and Fincham, 1954; Katsura and Nagashima, 1974; Connolly and Haughton, 1972). The corresponding equilibrium constant, K 1 is given by

$$ {K_1} = \left( {{a_{{s^{2 - }}}}/{a_{{O^{2 - }}}}} \right){\left( {{f_{{O_{2/}}}}/{f_{{S_2}}}} \right)^{0.5}} = \left( {{\gamma_{{S^{2 - }}}}/{a_{{O^{2 - }}}}} \right)C_S^m $$
(2)

, where C mS (the molar sulfide capacity) is the sulfide content of a silicate melt that is normalized (Doyle, 1983) to account for the effect of the composition of the coexisting gas, a i and γ i (are activity and activity coefficient for corresponding component i in the melt, respectively; f i -fugacity of component t i in the equilibrium gas.

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Authors
  1. Christopher D. Doyle
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Editors and Affiliations

  1. Institute of Experimental Mineralogy, USSR Academy of Sciences, Moscow District, Chernogolovka, 142432, Russia

    Leonid L. Perchuk

  2. Geological Institute, Faculty of Science, University of Tokyo, Tokyo, 113, Japan

    Ikuo Kushiro

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Doyle, C.D. (1991). The Relationship Between Activities of Divalent Cation Oxides and the Solution of Sulfide in Silicate and Aluminosilicate Liquids. In: Perchuk, L.L., Kushiro, I. (eds) Physical Chemistry of Magmas. Advances in Physical Geochemistry, vol 9. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-3128-8_8

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  • DOI: https://doi.org/10.1007/978-1-4612-3128-8_8

  • Publisher Name: Springer, New York, NY

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  • Online ISBN: 978-1-4612-3128-8

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