## Physical Properties of Crystals |

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Page 129

We can see immediately from the shape of the surface that, for example, there is

no longitudinal

triad axis. This is also obvious from symmetry. The longitudinal effect is ...

We can see immediately from the shape of the surface that, for example, there is

no longitudinal

**piezoelectric effect**when a quartz crystal is compressed along thetriad axis. This is also obvious from symmetry. The longitudinal effect is ...

Page 130

The direct

piezoelectric moduli; they form a third-rank tensor. If body-torques are neglected,

oij = aii, and we put for convenience dijk = diks. This reduces the number of ...

The direct

**piezoelectric effect**is given by P = diskojk, (3) where the disk are thepiezoelectric moduli; they form a third-rank tensor. If body-torques are neglected,

oij = aii, and we put for convenience dijk = diks. This reduces the number of ...

Page 191

These in turn can produce a polarization by

the experiments are carefully performed, can be mistaken for primary or

secondary pyroelectricity. SUMMARY FIGs. 10.1 a and b summarize the relations

between ...

These in turn can produce a polarization by

**piezoelectric effects**, which, unlessthe experiments are carefully performed, can be mistaken for primary or

secondary pyroelectricity. SUMMARY FIGs. 10.1 a and b summarize the relations

between ...

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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