## Crystals and their structures |

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### Contents

Symmetry and Crystals | 1 |

Point Groups Bravais Lattices and Space Groups | 30 |

The Internal Structure of Crystals | 75 |

Copyright | |

5 other sections not shown

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### Common terms and phrases

arrangement atom or ion atoms axes axis of symmetry band beam black and white Bravais lattice Ca2+ cardboard centre Chapter coloured consider construct covalent bonds crystal system Crystallography cube defects diagram dipole direction dislocation edge electric electrons electrostatic equation example exercise extra face-centred cubic faces fact ferromagnetism four-fold goniometer group multiplication table hexagonal impurity interstitial inversion ionic crystal large number lattice point layer length lens light magnetic field metal Miller indices molecules NaCl neutrons objects octahedron optical ordinary parallel particle photograph piezo-electricity plane of symmetry positive charge possible produce projection radius refractive refractive indices rhombic dodecahedron right angles rotation axis screw screw axis Section semiconductor shown in Fig sodium chloride solid space groups specimen sphere square stereogram structure substance symmetry elements symmetry operations tion triangle two-dimensional two-fold uncoloured unit cell velocity wave wavelength white point groups whole number