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Lookup NU author(s): Emeritus Professor Trevor Page
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© 2020 American Ceramic Society (ACERS)Crystalline quartz has long been identified as among the weakest of abundant crustal minerals. This weakness is particularly evident around the α–β phase inversion at 573°C, in which Si–O bonds undergo a displacive structural transformation from trigonal to hexagonal symmetry. Here we present data using indentation testing methodologies that highlight the precipitous extent of the transformational weakening. Although the indentations are localized over relatively small specimen contact areas, the data quantify the essential deformation and fracture properties of quartz in a predominantly (but not exclusively) compressive stress field, at temperatures and pressures pertinent to conditions in the earth's crust.
Author(s): Lawn B, Marshall D, Raj R, Hirth G, Page T, Yeomans J
Publication type: Article
Publication status: Published
Journal: Journal of the American Ceramic Society
Year: 2021
Volume: 104
Issue: 1
Pages: 23-26
Print publication date: 01/01/2021
Online publication date: 08/09/2020
Acceptance date: 28/08/2020
ISSN (print): 0002-7820
ISSN (electronic): 1551-2916
Publisher: Blackwell Publishing Inc.
URL: https://doi.org/10.1111/jace.17470
DOI: 10.1111/jace.17470
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