## Physical Properties of Crystals |

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Page 78

John Frederick Nye. 7.

developing an electric polarization when their temperature is changed. ... In the

first case, with the crystal clamped, the

John Frederick Nye. 7.

**Pyroelectricity**Certain crystals have the property ofdeveloping an electric polarization when their temperature is changed. ... In the

first case, with the crystal clamped, the

**effect**observed is called primary**pyroelectricity**.Page 190

This equation, which is equivalent to (56), gives the secondary

the piezoelectric coefficients, the ... may make the difference between finding a

finite primary

the ...

This equation, which is equivalent to (56), gives the secondary

**effect**in terms ofthe piezoelectric coefficients, the ... may make the difference between finding a

finite primary

**effect**and none at all.f The relation of secondary**pyroelectricity**tothe ...

Page 191

These in turn can produce a polarization by piezoelectric

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

secondary

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 relationsbetween ...

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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