Inversion of quartz solid solutions at cryogenic temperatures. Issue 11 (9th August 2020)

• Record Type: Journal Article
• Authors: Zandona, Alessio; Helsch, Gundula; Deubener, Joachim
• Is Part Of: Journal of the American Ceramic Society. Volume 103:Issue 11(2020)
• Page Start: 6630
• Page End: 6638
• Publication Date: 2020-08-09
• Subjects: cryogenics -- LAS glass‐ceramics -- quartz inversion -- quartz solid solution -- X‐ray diffraction; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.17393
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: Quartz solid solution crystals of six different compositions were obtained from crystallization of glass powders belonging to the Li2 O–Al2 O3 ‐SiO2 (LAS) system. They were analyzed in situ by laboratory‐based X‐ray diffraction down to cryogenic temperatures (−190°C). Temperature‐resolved analysis of their lattice parameters allowed determination of the critical inversion temperature T c in these materials, marking the displacive phase transition from a high‐quartz‐ to a low‐quartz‐like lattice. Integrating available data from other literature sources, an updated phase diagram for the occurrence of high and low quartz solid solution phases is provided for the LAS system; these data are expected to support future development of functional materials relying on these crystalline phases.