## Physical Properties of Crystals: Their Representation by Tensors and Matrices |

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Page 23

The quadric will then automatically possess all the other symmetry elements that

are found in the various classes of these three systems: rotation

to the principal axis, and planes TABLE 3 The, effect of crystal symmetry on ...

The quadric will then automatically possess all the other symmetry elements that

are found in the various classes of these three systems: rotation

**diad axes**normalto the principal axis, and planes TABLE 3 The, effect of crystal symmetry on ...

Page 24

The lengths of the three axes of the quadric determine the property completely. If

the tensor is referred to the x, y, z crystallographic axes it takes the form shown in

Table 3. (iv) Monoclinic system. Here we must arrange one of the

The lengths of the three axes of the quadric determine the property completely. If

the tensor is referred to the x, y, z crystallographic axes it takes the form shown in

Table 3. (iv) Monoclinic system. Here we must arrange one of the

**diad axes**of ...Page 129

The longitudinal component of polarization then changes sign and when 6 = 60°,

so that the tensile stress is again along a

indirection. The figure may also be readily interpreted in terms of the converse ...

The longitudinal component of polarization then changes sign and when 6 = 60°,

so that the tensile stress is again along a

**diad axis**, it reaches a maximum in the +indirection. The figure may also be readily interpreted in terms of the converse ...

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### Contents

THE GROUNDWORK OF CRYSTAL PHYSICS | 3 |

EQUILIBRIUM PROPERTIES | 51 |

ELECTRIC POLARIZATION | 68 |

15 other sections not shown

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### Common terms and phrases

angle anisotropic applied axial vector centre of symmetry Chapter coefficients conductivity constant crystal classes crystal properties crystal symmetry cube cubic crystals defined denoted diad axis dielectric direction cosines displacement dummy suffix electric field ellipsoid equal equation example expression follows force given heat flow Hence hexagonal homogeneous indicatrix isothermal isotropic left-handed length longitudinal magnetic magnitude matrix notation measured moduli monoclinic number of independent Onsager's Principle optical activity orientation parallel Peltier permittivity perpendicular photoelastic effect piezoelectric effect plane plate polarization positive principal axes produced pyroelectric pyroelectric effect quantities radius vector referred refractive refractive index relation representation quadric represented right-handed rotation scalar second-rank tensor set of axes shear stress suffix notation surface susceptibility symmetry elements Table temperature gradient tensile stress thermal expansion thermodynamics thermoelectric effects Thomson heat tion transformation law trigonal uniaxial unit volume values written Young's Modulus zero