Compressibility of Solid C60

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Science  31 May 1991:
Vol. 252, Issue 5010, pp. 1288-1290
DOI: 10.1126/science.252.5010.1288


Room-temperature powder x-ray diffraction profiles have been obtained at hydrostatic pressures P = 0 and 1.2 gigapascals on the solid phase of cubic C60 ("fullerite"). Within experimental error, the linear compressibility d(ln a)/dP is the same as the interlayer compressibility d(ln c)/dP of hexagonal graphite, consistent with van der Waals intermolecular bonding. The volume compressibility –d(ln V)/dP is 7.0 ± 1 x 10-12 square centimeter per dyne, 3 and 40 times the values for graphite and diamond, respectively.

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