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High-temperature equation of state of vanadium

Crichton, WA; Guignard, J; Bailey, E; Dobson, DP; Hunt, SA; Thomson, AR; (2016) High-temperature equation of state of vanadium. High Pressure Research , 36 (1) pp. 16-22. 10.1080/08957959.2015.1123256. Green open access

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Abstract

The unit cell dimensions of vanadium, NaCl and Au have beencollected to 11. 5 GPa and 1000 K by powder X-ray diffraction andare used to constrain a practical high-temperature EoS forbccvanadium. The resulting third-order Birch–Murnaghan EoS isdescribed with parametersKT0,300= 150.4 ± 6.2 GPa,K′T= 5.5 ± 1.0,α0= 4.8(6)·10−5,α1=−2.4(9)·10−8andδKTδT=−0.0446(7) GPa/K.The parameterα.K0,300is 616·10−5K−1GPa and reduces to zero atan estimated 60 GPa at RT. This EoS description is entirelyconsistent with the majority of X-ray, ultrasonic, shock wave andcalculated data-sets in thisp,Trange. These measurementsfacilitate the estimation ofin situtemperatures under highpressures when vanadium is used inside sample assemblies andare useful, when used withh-BN, to estimatep,Tover the fullrange ofh-BN stability.

Type: Article
Title: High-temperature equation of state of vanadium
Open access status: An open access version is available from UCL Discovery
DOI: 10.1080/08957959.2015.1123256
Publisher version: http://dx.doi.org/10.1080/08957959.2015.1123256
Language: English
Additional information: Copyright © 2016 Taylor & Francis. This is an Accepted Manuscript of an article published by Taylor & Francis in High Pressure Research on 21 January 2016 and available online: http://dx.doi.org/10.1080/08957959.2015.1123256
Keywords: Vanadium, high pressure, equation of state, diffraction
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1478098
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