STRUCTURAL MODEL OF ORTHORHOMBIC AL3CO

Authors
WIDOM M PHILLIPS R ZOU J CARLSSON AE
Citation
M. Widom et al., STRUCTURAL MODEL OF ORTHORHOMBIC AL3CO, Philosophical magazine. B. Physics of condensed matter. Structural, electronic, optical and magnetic properties, 71(3), 1995, pp. 397-406
Citations number
19
Categorie Soggetti
Physics, Applied
Journal title
Philosophical magazine. B. Physics of condensed matter. Structural, electronic, optical and magnetic properties → ACNP
ISSN journal
09586644
Volume
71
Issue
3
Year of publication
1995
Pages
397 - 406
Database
ISI
SICI code
0958-6644(1995)71:3<397:SMOOA>2.0.ZU;2-X
Abstract
The Al-Co alloy system contains a phase Al3Co of unknown structure. Re cently Ma and Kuo determined its space group as Pnmn with lattice cons tants a = 12.5 angstrom, b = 8.1 angstrom and c = 14.6 angstrom. We pr opose a structural model for the orthorhombic phase of Al3Co including explicit atomic positions and occupancy factors. This model relates t o the monoclinic phase of Al13Co4 by periodic twinning. Our model disp lays mechanical and thermodynamic stability as determined using approx imate pair potentials developed for the Al-Co alloys.