## Physical Properties of Crystals |

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Page 102

distinguished from the

either positive or negative, the

be a real or an imaginary ellipsoid or a hyperboloid; the surface given by (11), ...

distinguished from the

**strain**quadric. Since the principal**strains**e1, e2, es can beeither positive or negative, the

**strain**quadric, e12.É.-He, aft-Hează = 1, (12) canbe a real or an imaginary ellipsoid or a hyperboloid; the surface given by (11), ...

Page 104

small region in which the

directions may then be defined for each point; they will, in general, be different for

every point of the body. In the same way the

...

small region in which the

**strain**is sensibly homogeneous. Three principal**strain**directions may then be defined for each point; they will, in general, be different for

every point of the body. In the same way the

**strain**at each point of the body may...

Page 105

The symmetrical part of this tensor, with components eij = }(eij-Heji), represents

the

represents the rotation. The components e11, eas, eas are the stretches or

tensile ...

The symmetrical part of this tensor, with components eij = }(eij-Heji), represents

the

**strain**at the point; the antisymmetrical part, with components - wij = }(eij-eji),represents the rotation. The components e11, eas, eas are the stretches or

tensile ...

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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