Compressibility of CO intercalated C60 crystals

Titelangaben

van Smaalen, Sander ; Dinnebier, Robert E. ; Milletich, Ronald ; Kunz, Martin ; Holleman, Iwan ; von Helden, Gert ; Meijer, Gerard:
Compressibility of CO intercalated C60 crystals.
In: Chemical Physics Letters. Bd. 319 (2000) Heft 3–4 . - 283 - 286.
ISSN 1873-4448
DOI: https://doi.org/10.1016/S0009-2614(00)00096-8

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Abstract

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=−V dP/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.