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Journal Article

Compressibility of CO intercalated C60 crystals

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van Smaalen, S., Dinnebier, R. E., Milletich, R., Kunz, M., Holleman, I., von Helden, G., et al. (2000). Compressibility of CO intercalated C60 crystals. Chemical Physics Letters, 319(3-4), 283-286. doi:10.1016/S0009-2614(00)00096-8.

Cite as: https://hdl.handle.net/21.11116/0000-000B-6AEC-5
We report the pressure dependence of the cubic lattice parameter of (CO)xC60 at different temperatures, as determined by X-ray powder diffraction. In the measured range of pressures from 0.2 to 2 GPa, the volume is found to depend linearly on the pressure. The extrapolated volume bulk modulus of the ordered phase at room temperature is found to be K0=-VdP/dV=31.5(5) GPa. The bulk modulus at T=150 K is found as K0=26.9(5) GPa. The greater stiffness at higher temperature is explained by the entropic contribution of the CO molecules to the bulk modulus.