Key points are not available for this paper at this time.
The five independent elastic moduli of single-crystalline graphite are determined using inelastic x-ray scattering. At room temperature the elastic moduli are, in units of GPa, C₁₁=1109, C₁₂=139, C₁₃=0, C₃₃=38. 7, and C₄₄=4. 95. Our experimental results are compared with predictions of ab initio calculations and previously reported incomplete and contradictory data sets. We obtain an upper limit of 1. 10. 3em{0ex}TPa for the on-axis Young's modulus of homogeneous carbon nanotube, thus providing important constraints for further theoretical advances and quantitative input to model elasticity in graphite nanotubes.
Bosak et al. (Mon,) studied this question.