Structure of Al4Mn Decagonal Phase as a Penrose-Type Lattice
- 15 March 1987
- journal article
- research article
- Published by Physical Society of Japan in Journal of the Physics Society Japan
- Vol. 56 (3) , 982-988
- https://doi.org/10.1143/jpsj.56.982
Abstract
Electron and X-ray diffractions from a metastable phase in an Al 79.5 Mn 20.5 alloy, formed by a rather slow quenching of the melt, have been consistently interpreted by the decagonal quasicrystalline phase (L. Bendersky: Phys. Rev. Left. 55 (1985) 1461). A structural model of the phase is proposed, in which two unit cells with the Penroserhombic prisms (edge length 4.30 Å and height 4.15 Å), containing five and three atoms, are packed in a plane, satisfying a face-matching rule to form a Penrose-type lattice with a ten-fold symmetry. These quasicrystalline layers stack periodically with an ordered modulation at every three layers.Keywords
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