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Self-Diffusion of Silicon and Oxygen in Silicate Melts: An Experimental Study

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Part of the Springer Series in Chemical Physics book series (CHEMICAL,volume 36)

Abstract

The rate of diffusive transport of Si and O in silicate melts is important not only in understanding kinetics of magmatic processes but also in studying the structure of silicate melts. The coefficients of self-diffusion of Si and O were determined experimentally in two simple silicate melts of geologic interest: jadeite composition; NaAlSi2O6, and diopside composition, CaMgSi2 O. These melts were selected because they represent: (1) contrasting degrees of polymerization, i.e., jadeite melt is highly polymerized, whereas diopside melt is de-polymerized [1], (2) extremes in the spectrum of viscosities, i.e., jadeite melt at the high viscosity end and diopside melt at the low viscosity end [2], and (3) contrasting behavior in terms of their pressure-induced variations in viscosities, i.e., jadeite melt shows a decrease of viscosity with increasing pressure [3], whereas diopside melt shows an increase of viscosity with increasing pressure [2].

Keywords

  • Carnegie Inst
  • Diffusion Unit
  • Geologic Interest
  • Simple Silicate
  • Negative Volume Change

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© 1984 Springer-Verlag Berlin Heidelberg

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Shimizu, N., Kushiro, I. (1984). Self-Diffusion of Silicon and Oxygen in Silicate Melts: An Experimental Study. In: Benninghoven, A., Okano, J., Shimizu, R., Werner, H.W. (eds) Secondary Ion Mass Spectrometry SIMS IV. Springer Series in Chemical Physics, vol 36. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-82256-8_122

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  • DOI: https://doi.org/10.1007/978-3-642-82256-8_122

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-82258-2

  • Online ISBN: 978-3-642-82256-8

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