## Physical Properties of Crystals: Their Representation by Tensors and Matrices |

### From inside the book

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Page 20

The effect of

discussion of second-rank tensor properties for a while and broaden our outlook

to include all crystal properties. We have to examine the question of how the

symmetry ...

The effect of

**crystal symmetry**on crystal properties We must now leave ourdiscussion of second-rank tensor properties for a while and broaden our outlook

to include all crystal properties. We have to examine the question of how the

symmetry ...

Page 22

But Neumann 's Principle states that the symmetry of the property depends on the

point group. Therefore Neumann's Principle does not apply to X-ray diffraction.

5.1. The effect of

But Neumann 's Principle states that the symmetry of the property depends on the

point group. Therefore Neumann's Principle does not apply to X-ray diffraction.

5.1. The effect of

**crystal symmetry**on second-rank tensor properties.Page 321

Space group, 278. Specific heat, see Heat capacity. Stereogram, 279.

Stereographic projection, 279. Stiffnesses, elastic, 131-49. non- vanishing, 140-1.

relation to compliances, 147. Strain, 93-109. and

101-2.

Space group, 278. Specific heat, see Heat capacity. Stereogram, 279.

Stereographic projection, 279. Stiffnesses, elastic, 131-49. non- vanishing, 140-1.

relation to compliances, 147. Strain, 93-109. and

**crystal symmetry**, 104. ellipsoid,101-2.

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### Contents

THE GROUNDWORK OF CRYSTAL PHYSICS | 3 |

EQUILIBRIUM PROPERTIES | 51 |

ELECTRIC POLARIZATION | 68 |

69 other sections not shown

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### Common terms and phrases

angle anisotropic applied biaxial birefringence centre of symmetry Chapter coefficients conductivity crystal classes crystal properties crystal symmetry cube cubic crystals defined denoted diad axis dijk direction cosines electric field electro-optical effect ellipsoid equal equation example expression follows force given gives heat flow Hence hexagonal indicatrix isothermal isotropic lattice left-handed magnetic magnitude matrix notation measured moduli monoclinic number of independent Onsager's Principle optic axis optical activity orientation permittivity perpendicular photoelastic effect piezoelectric effect plane plate point group positive principal axes produced pyroelectric effect quadric quantities radius vector referred refractive index relation representation quadric represents right-handed rotation scalar second-rank tensor set of axes shear shown shows strain stress suffix notation symbol 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