Journal article


In situ structural analysis of calcium aluminosilicate glasses under high pressure


Publication Details
Author(s): Muniz RF, de Ligny D, Martinet C, Sandrini M, Medina AN, Rohling JH, Baesso ML, Lima SM, Andrade LHC, Guyot Y
Publisher: Institute of Physics: Hybrid Open Access
Publication year: 2016
Volume: 28
Journal issue: 31
ISSN: 0953-8984
eISSN: 1361-648X

Abstract

In situ micro-Raman spectroscopy was used to investigate the structural evolution of OH--free calcium aluminosilicate glasses, under high pressure and at room temperature. Evaluation was made of the role of the SiO2 concentration in percalcic join systems, for Al/(Al + Si) in the approximate range from 0.9 to 0.2. Under high pressure, the intensity of the main band related to the bending mode of bridging oxygen (nu(B)[T-O-T], where T = Si or Al) decreased gradually, suggesting that the bonds were severely altered or even destroyed. In Si-rich glasses, compression induced a transformation of Qn species to Qn-1. In the case of Al-rich glass, the Al in the smallest Qn units evolved from tetrahedral to higher-coordinated Al ([5] Al and [6] Al). Permanent structural changes were observed in samples recovered from the highest pressure of around 15 GPa and, particularly for Si-rich samples, the recovered structure showed an increase of three-membered rings in the Si/Al tetrahedral network.



How to cite
APA: Muniz, R.F., de Ligny, D., Martinet, C., Sandrini, M., Medina, A.N., Rohling, J.H.,... Guyot, Y. (2016). In situ structural analysis of calcium aluminosilicate glasses under high pressure. Journal of Physics: Condensed Matter, 28(31). https://dx.doi.org/10.1088/0953-8984/28/31/315402

MLA: Muniz, R. F., et al. "In situ structural analysis of calcium aluminosilicate glasses under high pressure." Journal of Physics: Condensed Matter 28.31 (2016).

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