## Physical Properties of Crystals |

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Page 94

The strain of the section PQ is

length T PQ Az The strain at the point P is

doc' The strain at any point is thus

The strain of the section PQ is

**defined**as: increase in length P'Q'—PQ Au originallength T PQ Az The strain at the point P is

**defined**as: e = lim Au – du (1) Ajo Air Tdoc' The strain at any point is thus

**defined**simply as the slope of the curves in ...Page 175

Differentia** do = du–oudo-sudou-Tds—Sat, which, on combining with (14),

leads to dq = —eg dog—S d'T. (16) Now in the

the quantities are functions of (og, T), which we agreed to use to

of the ...

Differentia** do = du–oudo-sudou-Tds—Sat, which, on combining with (14),

leads to dq = —eg dog—S d'T. (16) Now in the

**definition**of q), equation (15), allthe quantities are functions of (og, T), which we agreed to use to

**define**the stateof the ...

Page 276

An ideal crystal is

lattice; by this is meant (a) that the atomic arrangement appears the same, and in

the same orientation, when viewed from all the lattice points, and (b) the atomic ...

An ideal crystal is

**defined**to be a body in which the atoms are arranged in alattice; by this is meant (a) that the atomic arrangement appears the same, and in

the same orientation, when viewed from all the lattice points, and (b) the atomic ...

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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