| Issue |
J. Phys. Colloques
Volume 47, Number C8, Décembre 1986
EXAFS and Near Edge Structure IV
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|---|---|---|
| Page(s) | C8-1029 - C8-1032 | |
| DOI | https://doi.org/10.1051/jphyscol:19868198 | |
J. Phys. Colloques 47 (1986) C8-1029-C8-1032
DOI: 10.1051/jphyscol:19868198
LOCAL STRUCTURE OF ICOSAHEDRAL AND AMORPHOUS Al-Mn ALLOYS
J.B. BOYCE1, F.G. BRIDGES2 et J.J. HAUSER31 Xerox Palo Alto Research Center, Palo Alto, CA 94304, U.S.A.
2 Department of Physics, University of California, Santa Cruz, CA 95064, U.S.A.
3 AT&T Bell Laboratories, Murray Hill, NJ 07974, U.S.A.
Résumé
Nous comparons les mesures EXAFS au seuil d'absorption K du manganése entre Al-Mn icosahédrique (i), amorphe (a) et cristallin (c). Les phases i et a présentent des distributions de proches voisins Mn-Al, trés similaires. Ces distributions sont trouveés plus larges et plus asymétriques que dans la phase C. L'asymétrie de la phase a est quelque peu moins prononceé que celle associeé à la phase i. Toutes les phases ont environ 10 atomes Al premiers voisins des atomes Mn.
Abstract
EXAFS measurements on the Mn K edge of icosahedral (i), amorphous (a), and crystalline (c) Al-Mn are compared. It is found that the i- and a-phases have very similar Mn-Al near neighbor distributions, both of which are broader and more asymmetric than that for the c-phase. The asymmetry for the a-phase is somewhat less pronounced than that for the i-phase. All phases have approximately 10 Al first neighbors to the Mn atoms.