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

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Page 246

Hence, the optical properties of the crystal in the field will be those appropriate to

the trigonal class 3, which is

stress applied parallel to a 3-, 4- or 6-fold axis will give an optically

crystal ...

Hence, the optical properties of the crystal in the field will be those appropriate to

the trigonal class 3, which is

**uniaxial**. We can immediately see that a**uniaxial**stress applied parallel to a 3-, 4- or 6-fold axis will give an optically

**uniaxial**crystal ...

Page 253

Formulae (33) and (34) refer to a cubic crystal under

cube axis. They give the birefringences along the other two cube axes. In Table

16 we include the corresponding results for some other conditions of stressing ...

Formulae (33) and (34) refer to a cubic crystal under

**uniaxial**tension parallel to acube axis. They give the birefringences along the other two cube axes. In Table

16 we include the corresponding results for some other conditions of stressing ...

Page 283

These three systems are therefore said to be

indicatrix is a sphere and the system is said to be anaxial or optically isotropic.

Although it is founded on the optical properties, this grouping of the systems has

a ...

These three systems are therefore said to be

**uniaxial**. For the cubic system theindicatrix is a sphere and the system is said to be anaxial or optically isotropic.

Although it is founded on the optical properties, this grouping of the systems has

a ...

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### Contents

THE GROUNDWORK OF CRYSTAL PHYSICS | 3 |

EQUILIBRIUM PROPERTIES | 51 |

ELECTRIC POLARIZATION | 68 |

15 other sections not shown

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### Common terms and phrases

angle anisotropic applied axial vector centre of symmetry Chapter coefficients conductivity constant crystal classes crystal properties crystal symmetry cube cubic crystals defined denoted diad axis dielectric direction cosines displacement dummy suffix electric field ellipsoid equal equation example expression follows force given heat flow Hence hexagonal homogeneous indicatrix isothermal isotropic left-handed length longitudinal magnetic magnitude matrix notation measured moduli monoclinic number of independent Onsager's Principle optical activity orientation parallel Peltier permittivity perpendicular photoelastic effect piezoelectric effect plane plate polarization positive principal axes produced pyroelectric pyroelectric effect quantities radius vector referred refractive refractive index relation representation quadric represented right-handed rotation scalar second-rank tensor set of axes shear stress suffix notation surface susceptibility symmetry elements Table temperature gradient tensile stress thermal expansion thermodynamics thermoelectric effects Thomson heat tion transformation law trigonal uniaxial unit volume values written Young's Modulus zero