a metastable aluminosilica compound for aluminum and water transport to the upper mantle
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ID: 129334
2009
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Abstract
It has been suggested that crystalline “phase egg,” AlSiO3OH, with a ratio Al/Si=1 could carry aluminum and water to the mantle but its natural occurrences are still speculative. An amorphous phase with a fixed and unique, deep metastable eutectic Al2Si2O7 composition was produced in laboratory experiments wherein conditions favored kinetically controlled formation of amorphous solids. This experimentally produced kaolinite-dehydroxylate is highly reactive and it is proposed as the precursor of phase egg in subducting slabs of crustal rocks. If so, metastable phases play a role in subduction zones and it then follows that the processes and resulting conditions in these environments can be nonuniform and discontinuous at least at micrometer scales.
| Reference Key |
rietmeijer2009internationala
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|---|---|
| Authors | ;Frans J. M. Rietmeijer;Joseph A. Nuth |
| Journal | organometallics |
| Year | 2009 |
| DOI |
10.1155/2009/909431
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| URL | |
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