Stacking disorder: the hexagonal polymorph of tris(bicyclo[2.1.1]hexeno)benzene and related examples
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Hans-Beat Bürgi
Abstract
X-ray diffractograms of tris(bicyclo[2.1.1]hexeno)benzene, crystallized at the interface between a benzene solution and a layer of acetonitrile, show hexagonal symmetry and streaks of diffuse scattering along c*. The heavily faulted layer stacking is analyzed qualitatively and quantitatively in terms of a systematic protocol. This protocol requires partitioning the crystal structure into layers in such a way that pairs of adjacent layers may be stacked in different, but geometrically equivalent ways, which are dictated by the layer group symmetry. This approach is shown to provide a consistent alternative for analysis of a number of related cases provided the layers are defined on the basis of geometrical criteria rather than chemical intuition.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Artikel in diesem Heft
- Grazing incidence diffraction of cadmium arachidate multilayers at the solid-liquid interface
- Editorial: Diffuse Scattering
- Diffuse scattering from microstructures and mesostructures
- Atomic pair distribution function analysis of materials containing crystalline and amorphous phases
- Determination of phonon dispersion relations by X-ray thermal diffuse scattering
- Diffuse scattering and disorder in zirconia
- Disorder, structured diffuse scattering and the transmissionelectron microscope
- Modelling disorder in 3,3′-dimethoxybenzil, C16H14O4
- Diffuse scattering and phason modes in the i-AlPdMn quasicrystalline phase
- Problems in measuring diffuse X-ray scattering
- Case studies of molecular disorder
- Stacking disorder: the hexagonal polymorph of tris(bicyclo[2.1.1]hexeno)benzene and related examples
- Diffuse X-ray scattering from tiny sample volumes
- Magnetic short-range order in disordered and ordered binary alloys
- Diffuse scattering in the layered perovskites
- Cooperative Evolution — a new algorithm for the investigation of disordered structures via Monte Carlo modelling
