Alkaline-earth aluminosilicates are of both technological and scientific interest. In particular their properties make them attractive for a wide range of industrial applications. In geosciences, they are of fundamental importance as they form a significant fraction of the composition of geological magmas.

Among these systems, strontium aluminosilicates (SAS) are interesting composition for making glass ceramics or transparent ceramics [1]. However, due to their relatively high melting point, only a few structural studies at high temperature exist on this system and the thermophysical properties are almost unknown despite their importance for understanding the glass formation.

In this talk, I will present a structural study of various liquid SAS compositions performed using aerodynamic levitation and laser heating. Results will be also correlated to previous studies [2] and to thermophysical properties determined using the oscillating drop method [3].

[1] K. Al Saghir, S. Chenu, E. Veron, F. Fayon, M. Suchomel, C. Genevois, F. Porcher, G. Matzen, D. Massiot, M. Allix, Transparency through structural disorder: a new concept for innovative transparent ceramics. Chem. Mater. 27:508 (2015).

[2] A. Novikov, D. R. Neuville, L. Hennet, Y. Gueguen, T. Charpentier, D. Thiaudière, P. Florian Al and Sr environnent in tectosilicate glasses and melts: viscosity, Raman and NMR investigation Chem. Geol. 461 115-127 (2017).

[3] D. Langstaff, M. Gunn, G. N. Greaves, A. Marsing, F. Kargl Aerodynamic levitator furnace for measuring thermophysical properties of refractory liquids. Rev. Sci. Instrum. 84, 124901 (2013).