title: Orientational disorder in solvent-free solid c70.
abstract: The high-temperature structure of solvent-free C(70) has been determined with high-resolution x-ray powder difraction and electron microscopy. Samples crystallized from solution form hexagonal close-packed crystals that retain an appreciable amount of residual toluene, even after prolonged heating. Samples prepared by sublimation, which contain no detectable solvent, are primarily face-centered cubic with some admixture of a hexagonal phase. The relative volume of the hexagonal phase can be further reduced by annealing. The structures of both phases are described by a model of complete orientational disorder. The cubic phase contains an appreciable density of stacking faults along the [111] direction.
authors.forename: G B
authors.initials: GB
authors.lastname: Vaughan
authors.forename: P A
authors.initials: PA
authors.lastname: Heiey
authors.forename: D E
authors.initials: DE
authors.lastname: Luzzi
authors.forename: D A
authors.initials: DA
authors.lastname: Ricketts-Foot
authors.forename: A R
authors.initials: AR
authors.lastname: McGhie
authors.forename: J E
authors.initials: JE
authors.lastname: Fischer
authors.forename: Y W
authors.initials: YW
authors.lastname: Hui
authors.forename: A L
authors.initials: AL
authors.lastname: Smith
authors.forename: D E
authors.initials: DE
authors.lastname: Cox
authors.forename: W J
authors.initials: WJ
authors.lastname: Romanow
authors.forename: B H
authors.initials: BH
authors.lastname: Allen
authors.forename: N
authors.initials: N
authors.lastname: Coustel
authors.forename: J P
authors.initials: JP
authors.lastname: McCauley
authors.forename: A B
authors.initials: AB
authors.lastname: Smith