Experimental determination of the atomic quadrupole moment of graphite
- 1 January 1993
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions
- Vol. 89 (12) , 1909-1913
- https://doi.org/10.1039/ft9938901909
Abstract
The symmetry of the graphite crystal implies that each carbon atom has an electric quadrupole moment associated with it. This atomic moment may have a significant influence on the location of adsorbed molecules on a graphite surface and on the adsorption energy. A novel experiment, involving the measurement of the effect of a laboratory electric field gradient on the period of oscillation of a small single crystal of graphite mounted on a glass torsion fibre, has been carried out. The quadrupole moment of a carbon atom within the sample is found to be (–3.03 ± 0.10)× 10–40 C m2; however, this value may include a contribution from surface effects.Keywords
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