Evidence of a fcc-hcp Transition in Aluminum at Multimegabar Pressure

Y. Akahama, M. Nishimura, K. Kinoshita, H. Kawamura, and Y. Ohishi
Phys. Rev. Lett. 96, 045505 – Published 3 February 2006

Abstract

The structure phase transition and the equation of state (EOS) of the third-period simple metal Al were investigated at pressure up to 333 GPa by powder x-ray diffraction experiments. The theoretically predicted fcc-hcp transition was observed at the reduced volume V/V0 of 0.509(1), corresponding to the pressure of 217±10GPa. From the obtained pressure-volume data, the pressure derivative of the bulk modulus K0 for the EOS of fcc-Al was determined to be 4.83(3) by fitting to the Vinet formulation with a fixed value 72.7 GPa of K0 obtained from previous ultrasonic experiments.

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  • Received 28 July 2005

DOI:https://doi.org/10.1103/PhysRevLett.96.045505

©2006 American Physical Society

Authors & Affiliations

Y. Akahama*, M. Nishimura, K. Kinoshita, and H. Kawamura

  • Graduate School of Material Science, University of Hyogo, 3-2-1, Kouto, Kamigohri, Hyogo 678-1297, Japan

Y. Ohishi

  • Japan Synchrotron Radiation Research Institute, 1-1-1, Kouto, Mikazuki, Hyogo 679-5198, Japan

  • *Corresponding author. Electronic address: akahama@sci.u-hyogo.ac.jp

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Vol. 96, Iss. 4 — 3 February 2006

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