## Physical Properties of Crystals |

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Page xiii

For a few properties, such as density, all crystals are

happen to be

and refractive index, and this sometimes leads to the misconception that they are

...

For a few properties, such as density, all crystals are

**isotropic**. Cubic crystalshappen to be

**isotropic**for certain other properties as well, such as conductivityand refractive index, and this sometimes leads to the misconception that they are

...

Page 4

The relation between the electric current density j and the electric field E in (a) an

Ohm's Law, j is parallel to E (Fig. 1.1 a), and the magnitude of j is proportional to

the ...

The relation between the electric current density j and the electric field E in (a) an

**isotropic**conductor and (b) an anisotropic conductor. is**isotropic**and obeysOhm's Law, j is parallel to E (Fig. 1.1 a), and the magnitude of j is proportional to

the ...

Page 142

found to be

given by fourth-rank tensors, are not

numerical example we choose ammonium dihydrogen phosphate (ADP) (class

42m).

found to be

**isotropic**. We now see that the elastic properties of cubic crystals,given by fourth-rank tensors, are not

**isotropic**. (iv) Numerical example. For anumerical example we choose ammonium dihydrogen phosphate (ADP) (class

42m).

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### Contents

THE GROUND WORK OF CRYSTAL PHYSICS | 3 |

Summary | 29 |

EQUILIBRIUM PROPERTIES | 45 |

47 other sections not shown

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### Common terms and phrases

angle anisotropic applied biaxial birefringence centre of symmetry Chapter conductivity constant crystal classes crystal properties crystal symmetry cube cubic crystals defined denoted diad axis dielectric direction cosines displacement elastic compliances electric field electro-optical electro-optical effect ellipsoid equal equation example expression follows forces given gives grad heat flow Hence indicatrix isothermal isotropic magnetic magnitude matrix notation measured moduli Mohr circle monoclinic number of independent Onsager's Principle optic axis optical activity orientation parallel permittivity perpendicular photoelastic effect piezoelectric effect plane plate polarization positive principal axes produced pyroelectric effect quadric radius vector referred refractive index relation representation quadric represents right-handed rotation scalar second-rank tensor shear shown shows strain stress symmetry elements Table temperature gradient thermal expansion thermodynamics thermoelectric effects Thomson heat tion transformation law trigonal uniaxial unit volume values wave normal wave surface written zero