## Physical Properties of Crystals |

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Page 90

(i)

vertical rod loaded by hanging a weight on the end. A non-uniform distribution of

(i)

**Uniaxial**stress, o. or 0 01. 0 0 0 0 0 0 An example is the stress in a long,vertical rod loaded by hanging a weight on the end. A non-uniform distribution of

**uniaxial**stress occurs in the pure bending of a long bar. (ii) Biaxial stress. or 0 01.Page 239

The wave surface for a

propagated outwards from the point source in any direction. The indicatrix

construction shows that one of them always has the same refractive index no,

and ...

The wave surface for a

**uniaxial**crystal; (a) positive crystal, (b) negative crystal.propagated outwards from the point source in any direction. The indicatrix

construction shows that one of them always has the same refractive index no,

and ...

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 ...

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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