Site preference of cobalt and deuterium in the structure of a complex AB{sub 5} alloy electrode: A neutron powder diffraction study
- Brookhaven National Lab., Upton, NY (United States)
The site preference of cobalt and deuterium in the charged and discharged state of a commercial-type metal hydride anode was investigated by high resolution neutron powder diffraction using an alloy with an altered isotope composition. In the alloy La({sup 58}Ni{sub 0.376} {sup 62}Ni{sub 0.624}){sub 3.55}Co{sub 0.75}Mn{sub 0.33}Al{sub 0.30} the isotope ratio of {sup 58}Ni to {sup 62}Ni leads to a zero neutron scattering length for nickel. Rietveld refinement revealed that Al and Mn occupy the midplane 3g sites of the CaCu{sub 5} structure, while cobalt has a preference for 3g but also occupies the basal plane 2c sites. The space group of the deuteride remains P6/mmm which differs from the parent LaNi{sub 5}D{sub 7} which is P6{sub 3}mc.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Inst. of Standards and Technology, Gaithersburg, MD (United States)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 321125
- Journal Information:
- Journal of the Electrochemical Society, Vol. 146, Issue 1; Other Information: PBD: Jan 1999
- Country of Publication:
- United States
- Language:
- English
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