Structural dependence of crystalline silicate hydration during aqueous dissolution

Details Structural dependence of crystalline silicate hydration during aqueous dissolution Structural dependence of crystalline silicate hydration during aqueous dissolution

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989e%26psl..93..292p&link_type=abstract

Earth and Planetary Science Letters, Volume 93, Issue 2, p. 292-298.

Computer Science

9

Scientific paper

By using MeV ion beam analytical techniques which provide the depth profiles of incorporated hydrogen and major constituent elements, we show that, alike glasses, crystalline silicates can form surficial hydrated layers upon aqueous dissolution at temperatures up to 200°C. The occurrence of such layers depends on both crystal structure and chemical composition, tridimensional-network silicates containing easily exchangeable alkalis being the most suitable materials. This phenomenon could have important implications for the geochemical cycle of certain trace elements, since highly hydrolyzable ones tend to accumulate in such hydrated layers.

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