Roy, A. P. (1971) Temperature variation of the frequency of longitudinal inter-planar oscillations in pyrolitic graphite Canadian Journal of Physics, 49 . pp. 277-279. ISSN 0008-4204
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Official URL: http://www.nrcresearchpress.com/doi/abs/10.1139/p7...
Related URL: http://dx.doi.org/10.1139/p71-030
The zone-boundary longitudinal phonon frequency, propagating along the hexad axis in pyrolitic graphite, has been measured by neutron spectrometry over a temperature range of 200 to 900 °K. The relative frequency change for this temperature interval, Δν/ν, is 0.07, a very high value in view of the lower limit for the melting temperature for graphite of 3800 °K
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