STATIC DISORDER IN HEXAGONAL CRYSTAL-STRUCTURES OF C-60 AT 100 K AND 20 K

C-60. 2C(8)H(10) (100 K): hexagonal space group P6(3), a = 23.694(4), c = 10.046(2) Angstrom, V = 4884(2) Angstrom(3), D-x = 1.903 g cm(-3), Z = 6, F(000) = 2856, lambda(CuK alpha) = 1.54178 Angstrom, mu = 0.84 mm(-1) C-60. 2C(8)H(10) (20 K): hexagonal space group P6(3), a = 23.6 7(1), c = 10.02(1) Angstrom, V = 4862(6) Angstrom(3), D-x = 1.912 g cm (-3), Z = 6, F(000) = 2856, lambda(CuK alpha) = 1.54178 Angstrom, mu = 0.84 mm(-1). The structures were determined by Patterson syntheses an d rigid-body refinements. The C-60 molecules show two orientations wit h one molecular centre in common, The solvent molecules are disordered too. Static disorder could not be overcome or influenced by cooling d own. A coordination number of 10 was found for the fullerene molecules .