Local crystallography of crystals with disorder
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Takeshi Egami
Abstract
The assumption of perfect periodicity in the crystal lattice is the most basic tenet of crystallography. However, many materials are not crystalline. Even when they are the atomic structure of real materials is often less than perfectly periodic, and usually deviations from perfect periodicity have significant effects on their properties. Thus in order to characterize the structure of real materials by diffraction the crystallographic approaches need to be complemented by other methods focusing on disorder. B. E. Warren was a pioneer of such alternative, non-crystallographic approaches, including the method of atomic pair-density function (PDF) analysis. With the advent of synchrotron based radiation sources, such as pulsed neutron sources and synchrotron radiation sources, it recently became possible to apply the PDF technique on crystals with and without disorder, covering the whole spectrum of structural order and disorder. Here some of the recent progresses in this approach made in my research group are reviewed.
© 2004 Oldenbourg Wissenschaftsverlag GmbH
Articles in the same Issue
- Editorial: Structure of Complex Materials – Warren Award 2003
- The atomic pair distribution function: past and present
- Local crystallography of crystals with disorder
- Obtaining structural information from the atomic pair distribution function
- PDF analysis – from atomic displacements to nanocrystals
- Synchrotron studies of lattice distortions and lattice modulations in complex oxides
- Complexity of the phase transition in La1–xSrxCoO3
- Structural aspects of the M1 and M2 phases in MoVNbTeO propane ammoxidation catalysts
- High pressure study of a Zr-based bulk metallic glass and its composite
- Spatial periodicities of defect environments in 57Fe3Al studied by Mössbauer powder diffractometry
- Nanoporous thin films and porous inorganic substrates for lipid bilayer support materials
Articles in the same Issue
- Editorial: Structure of Complex Materials – Warren Award 2003
- The atomic pair distribution function: past and present
- Local crystallography of crystals with disorder
- Obtaining structural information from the atomic pair distribution function
- PDF analysis – from atomic displacements to nanocrystals
- Synchrotron studies of lattice distortions and lattice modulations in complex oxides
- Complexity of the phase transition in La1–xSrxCoO3
- Structural aspects of the M1 and M2 phases in MoVNbTeO propane ammoxidation catalysts
- High pressure study of a Zr-based bulk metallic glass and its composite
- Spatial periodicities of defect environments in 57Fe3Al studied by Mössbauer powder diffractometry
- Nanoporous thin films and porous inorganic substrates for lipid bilayer support materials
