## Crystal structure determination by electron diffraction |

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### Contents

ELECTRON DIFFRACTION | 269 |

The Interaction of Electrons with Crystals | 287 |

Structure Analyses from Arc and Ring Patterns | 294 |

Copyright | |

2 other sections not shown

### Common terms and phrases

absorption accuracy amplitudes arc patterns atomic scattering factors axis basis BiOCl Bragg angle Bragg condition calculated centre convergent beam diffraction Cowley crystal orientations crystal thickness curves Debye-Waller factor diffracted beams diffraction methods diffraction spots disorder dynamical effects dynamical scattering dynamical theory electron diffraction patterns electron micrograph electron microscope Ewald sphere example excitation errors experimental Fourier series Fresnel diffraction given incident beam direction intensity data inter kinematical approximation kinematical scattering large number layer lens limited maxima n-beam dynamical neutron diffraction oblique texture observed intensity obtained parameters perfect crystal regions plane polycrystalline possible potential distribution powder patterns reciprocal lattice points reciprocal space ring rotation scattering angles scattering power selected-area shown in Fig single crystal slice small crystals specimen structural information structure analysis structure factors superlattice symmetry systematic interactions techniques tion two-beam approximation unit cell usually values variation of intensity voltage wedge-shaped crystal X-ray diffraction