The viscosity of melt of soda melilite (CaNaAlSi 2 O 7 ) 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.
|Number of pages||4|
|Journal||Journal of Mineralogical and Petrological Sciences|
|Publication status||Published - 2019 Jan 1|
- Aluminosilicate melt
- Soda melilite
- X-ray radiography
ASJC Scopus subject areas