Abstract
Neutron diffraction measurements on highly oriented pyrolytic graphite intercalated with SbCl5 have been carried out and indicate that these intercalation compounds have practical application as long-wavelength neutron monochromators. This is due, in part, to their large d spacings and, in part, to their long-range c-axis stacking fidelity and chemical stability. The stage 2 compound is particularly suitable because it has intense first-order scattering accompanied by very weak second-order scattering. These intensity considerations are not as favorable for the stage 4 compound but applications at longer wavelengths are possible. At a scattering angle of 60° (2θ) neutrons of wavelengths 12.8 and 19.5 Å can be obtained from the stage 2 and stage 4 compounds, respectively. Structure-factor calculations for the 001 peaks are presented and are found to be in reasonable agreement with the diffraction data.
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