Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9803166 | Journal of Alloys and Compounds | 2005 | 4 Pages |
Abstract
A powder sample of fcc (γ) cobalt hydride was synthesised under a pressure of 9âGPa and a temperature of 350â° C and then studied at ambient pressure by neutron diffraction at 95âK and by inelastic neutron scattering (INS) at 5âK in the range of energy transfers 30-380âmeV. A profile analysis of the neutron diffraction pattern showed that hydrogen occupies octahedral interstitial sites in the fcc metal lattice of γ-CoH with a=3.7124(5) âÃ
. The INS investigation demonstrated that the fundamental band of optical hydrogen vibrations consists of a strong peak at 102âmeV with a broad shoulder towards higher energies. This intensity distribution is typical of hcp and fcc monohydrides of 3d- and 4d-metals, and the peak position as a function of the hydrogen-metal distance agrees with the dependence established for those hydrides earlier.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
V.E. Antonov, T.E. Antonova, V.K. Fedotov, T. Hansen, A.I. Kolesnikov, A.S. Ivanov,