Thermal expansion and compressibility of alamosite (PbSiO3) determined by in-situ synchrotron X-ray diffraction

Author(s)

Cunha, T. R. ; Sampaio, D. V. ; Pena, R. B. ; Moulton, B. J. A. ; Lancelotti, R. F. ; Alabarse, F. G. ; Rodrigues, A. D. ; Pizani, P. S.

• Document type: Journal article
• Source: CERAMICS INTERNATIONAL; v. 48, n. 23, p. 5-pg., 2022-11-07.

Abstract

This manuscript presents an investigation of alamosite, PbSiO3, obtained by crystallization of lead metasilicate glass, PbO.SiO2. Rietveld refinement of synchrotron X-ray diffraction (SXRD) measurements as a function of temperature and pressure confirmed the stable crystalline structure of PbSiO3, with a monoclinic crystal system in the P12/n1 (13) space group. The samples were heated to 973 K at ambient pressure and compressed to 6 GPa at room-temperature. Furthermore, the in situ temperature-induced lattice expansion and pressure-induced lattice compression are reported, providing the thermal expansion coefficients, compressibility and bulk modulus, important parameters determining physical properties of glass-ceramic materials. (AU)

• FAPESP's process: 16/18567-5 - Nuclei entrapment: the pre-nucleation structural ordering of homogeneous nucleating BaO-2SiO2 and CaO-SiO2 glasses
• Grantee: Benjamin John Albert Moulton
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 17/11025-5 - Effect of very high pressure on the structural and dynamical properties of perovskites
• Grantee: Ariano De Giovanni Rodrigues
• Support Opportunities: Scholarships abroad - Research
• FAPESP's process: 17/11868-2 - Correlation between structure and optical properties of (Äx, A'1-x)O + SiO2(A,A'= Pb,Ni,Co,Cr) glass ceramic serie under high hydrostatic pressure
• Grantee: Rafaella Bartz Pena
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 19/12383-8 - Study of structural and vibrational properties of glass and glass-ceramic materials via Raman scattering as a function of temperature and high hydrostatic pressures.
• Grantee: Thiago Rodrigues da Cunha
• Support Opportunities: Scholarships in Brazil - Post-Doctoral