Abstract
The structure and dynamics of "graphon", a carbon black, have been characterised by a combination of neutron diffraction and inelastic scattering experiments. The techniques employed were those of neutron diffraction, time-of-flight and beryllium-filter spectroscopy.The dimensions of the unit cell were found to be: a= 2.47 ±(0.01)Å, c= 6.93 ±(0.01)Å, and the average dimensions of the layer lattice were estimated from high angle diffraction as La= 30 Å and Lc= 85 Å.Well-defined average phonon groups were observed by inelastic scattering and used to construct an almost sinusoidal dispersion curve for longitudinal acoustic lattice vibrations along the c-axis. The stiffness constant C33, found from the dispersion curve, was 3.00 ±(0.02)× 1011 dyn cm–2. The frequency distribution of the lattice vibrations shows singularities at energies qualitatively in agreement with those calculated by Young and Koppel from specific heat measurements on graphite.
Keywords
Neutron diffractionNeutron scatteringNeutron reflectometryQuasielastic neutron scatteringGraphiteMicrocrystallineNeutronDiffractionInelastic scatteringSmall-angle neutron scatteringBerylliumInelastic neutron scatteringDynamics (music)ScatteringChemistryMaterials scienceCrystallographyNuclear physicsPhysicsOptics
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Publication Info
- Year
- 1976
- Type
- article
- Volume
- 72
- Pages
- 446-446
- Citations
- 29
- Access
- Closed
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Cite This
Philip H. Gamlen,
John W. White
(1976).
Structure and dynamics of microcrystalline graphite, graphon, by neutron scattering.
Journal of the Chemical Society Faraday Transactions 2 Molecular and Chemical Physics
, 72
, 446-446.
https://doi.org/10.1039/f29767200446
Identifiers
- DOI
- 10.1039/f29767200446