Journal of Mineralogical and Petrological Sciences
Online ISSN : 1349-3825
Print ISSN : 1345-6296
ISSN-L : 1345-6296
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Viscosity of melt of soda melilite composition at high pressure
Akio SUZUKI
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2019 Volume 114 Issue 1 Pages 41-44

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Abstract

The viscosity of melt of soda melilite (CaNaAlSi2O7) composition was measured using the falling sphere method with synchrotron X–ray radiography. This composition of melt was used as a model basalt, because the ratio of the non–bridging oxygen (NBO) and the tetrahedrally coordinated (T) cation is 0.67. We observed a viscosity minimum between 2 and 4 GPa. This finding shows that the partially depolymerized melt (NBO/T = 0.67) has a viscosity minimum under high pressure.

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© 2019 Japan Association of Mineralogical Sciences
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