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An X-ray diffraction study of semiconductor and metallic vanadium dioxide

Published online by Cambridge University Press:  10 January 2013

K. D. Rogers
Affiliation:
Cranfield Institute of Technology (RMCS), Shrivenham, Swindon, Wiltshire SN6 8LA, United Kingdom

Abstract

Powder diffraction data for semiconductor and metallic states of vanadium dioxide are presented. The structures are refined by Rietveld methods using a monoclinic cell (a = 5.7529Å, b = 4.5263Å, c = 5.3825Å, β = 122.61°) and space group P21/c for the room temperature data, and a tetragonal cell (a =4.5540Å, c = 2.8557Å) and space group P42/mnm for data collected at 400 K. The similarity between the corresponding X-ray diffraction patterns is discussed. The transition process from the monoclinic to tetragonal phase is investigated and initial evidence for the coexistence of phases over a small temperature range is presented.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1993

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