Hexagonal Close-Packed Structures in Bi–Pb Alloys and the Polymorphism of Lead at High Pressure
- 15 January 1963
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 38 (2), 298-299
- https://doi.org/10.1063/1.1733654
Abstract
Lattice spacings have been obtained for the hexagonal close-packed structures in lead alloys containing 27.0 to 32.0 at.% bismuth, which were rapidly cooled from the melt. Axial ratios for these structures vary from 1.653 to 1.654. By extrapolation to pure lead of these volume/atom determinations and of some activity data, the free energy of hexagonal close-packed lead relative to the face-centered cubic form is estimated. It is suggested that the structure of the lead polymorph stable at pressures greater than 0.16 Mbar is hexagonal close-packed.Keywords
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