Al Coordination Changes in High-Pressure Aluminosilicate Liquids

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Science  22 Dec 1995:
Vol. 270, Issue 5244, pp. 1964-1967
DOI: 10.1126/science.270.5244.1964


Understanding the effect of pressure on aluminosilicate glass and liquid structure is critical to understanding magma flow at depth. Aluminum coordination has been predicted by mineral phase analysis and molecular dynamic calculations to change with increasing pressure. Nuclear magnetic resonance studies of glasses quenched from high pressure provide clear evidence for an increase in the average coordination of Al with pressure.