Structural model of orthorhombic ai3co

M. Widom, Rob Phillips, J. Zou, A. E. Carlsson

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


The Al-Co alloy system contains a phase AI3CO of unknown structure. Recently Ma and Kuo determined its space group as Pnmn with lattice constants a = 12·5 Å, b = 8·1 Å and c = 14·6 Å. We propose a structural model for the orthorhombic phase of AI3CO including explicit atomic positions and occupancy factors. This model relates to the monoclinic phase of AI13CO4by periodic twinning. Our model displays mechanical and thermodynamic stability as determined using approximate pair potentials developed for the Al-Co alloys.

Original languageEnglish
Pages (from-to)397-406
Number of pages10
JournalPhilosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
Issue number3
StatePublished - Mar 1995


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