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Calibration of the ruby pressure scale to 150 GPa
Harvard University.
Harvard University.
Harvard University.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0002-5145-1560
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2007 (English)In: Physica status solidi. B, Basic research, ISSN 0370-1972, E-ISSN 1521-3951, Vol. 244, no 1, p. 460-467Article in journal (Refereed) Published
Abstract [en]

For many years the ruby pressure standard has been the so-called quasi-hydrostatic scale of Mao, Xu, and Bell published in 1986. The calibration was determined by X-ray diffraction of metal markers in an argon pressurization medium to 80 GPa, along with simultaneous measurement of the shift of the ruby R lines. We have used data in the literature, as well as our own, mostly for ruby in quasi-hydrostatic helium, to produce a new ruby scale with calibration data that extends to 150 GPa. The new scale shows that at the highest shifts of the ruby R lines the pressures are substantially higher than on the old scale. To understand small systematic shifts of the pressures as determined from the X-ray diffraction of metal "markers" used in the calibration, a finite element analysis of quasi-hydrostatic conditions in a diamond anvil cell has been carried out.

Abstract [en]

For many years the ruby pressure standard has been the so-called quasi-hydrostatic scale of Mao, Xu, and Bell published in 1986. The calibration was determined by X-ray diffraction of metal markers in an argon pressurization medium to 80 GPa, along with simultaneous measurement of the shift of the ruby R lines. We have used data in the literature, as well as our own, mostly for ruby in quasi-hydrostatic helium, to produce a new ruby scale with calibration data that extends to 150 GPa. The new scale shows that at the highest shifts of the ruby R lines the pressures are substantially higher than on the old scale. To understand small systematic shifts of the pressures as determined from the X-ray diffraction of metal "markers" used in the calibration, a finite element analysis of quasi-hydrostatic conditions in a diamond anvil cell has been carried out.

Place, publisher, year, edition, pages
2007. Vol. 244, no 1, p. 460-467
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Fysik
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URN: urn:nbn:se:ltu:diva-6183DOI: 10.1002/pssb.200672587ISI: 000243693600081Scopus ID: 2-s2.0-33847078045Local ID: 4621a5b0-e61a-11db-8a98-000ea68e967bOAI: oai:DiVA.org:ltu-6183DiVA, id: diva2:979060
Note
Validerad; 2007; 20070408 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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