Electric field gradients in Au-Te alloys and charge transfer in some intermetallic compounds of nontransition metals with gold
This work is an extension of an earlier study of charge transfer occurring when Au is alloyed with nontransition (main group) elements. Au Moessbauer-isomer-shift and quadrupole-splitting results are reported for a series of Au-Te alloys: AuTe/sub 2/, Au/sub 0.12/Te/sub 0.88/, Au/sub 0.052/Te/sub 0.948/, and Au/sub 0.01/Te/sub 0.99/. Asymmetric doublets are observed in the /sup 197/Au Moessbauer spectra of these alloys and are attributed to the Goldanskii-Karyagin effect. The sign of the electric field gradient is deduced to be negative. The quadrupole splittings, substantial relative to those ordinarily encountered in metals, are consistent with the presence of an amount of bonding charge along nearest-neighbor Te-Au-Te lines which exceeds by about 0.1e the charge along the two longer Te-Au-Te axes defining the equatorial positions in the distorted Te octahedron.
- Research Organization:
- Brookhaven National Laboratory, Upton, New York 11973
- OSTI ID:
- 5894471
- Journal Information:
- Phys. Rev., B: Condens. Matter; (United States), Journal Name: Phys. Rev., B: Condens. Matter; (United States) Vol. 20:9; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
Similar Records
Moessbauer study on pure H/sub 2/Te and photodissociated H/sub 2/Te in argon
Raman scattering in liquid K-Te.