Transmission Electron Microscopy pp 145-166 | Cite as

# Electron Crystallography, Charge-Density Mapping and Nanodiffraction

## Chapter Preview

This chapter does contain rather a lot of physics but don’t let that put you off. You can look up Dirac–Fock calculations, the Mott formula , and what the Debye–Waller factor is later if you want to. Ditto for the Simplex algorithm , the bootstrap method , Poisson statistics and the Fienup algorithm, but if you don’t immediately do so, you should have no problem in following the discussion. We’ve left the word electron in the title of the chapter to emphasize that this is not X-ray crystallography . The electron version has many features to recommend it – the interactions are stronger and most researchers now have access to a TEM with a field-emission gun. With the FEG you can examine a very small volume. One feature that comes up again is the perennial problem that we need thin specimens, which means we may have relaxation due to the proximity of a surface. Then we discuss using QCBED to learn about bonding. Clearly this will be an incredibly important...

## Keywords

Spherical Aberration Shadow Image Noncentrosymmetric Crystal Excitation Error Aberration Constant## References

## General References

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## Specific References

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## Background References

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