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

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Page 121

-0-17 0 0j 0 0 0/ (iv) Trigonal and

method used above is the most convenient one to use in deducing the conditions

imposed on the moduli in all the classes except those belonging to the trigonal

and ...

-0-17 0 0j 0 0 0/ (iv) Trigonal and

**hexagonal**systems. The direct inspectionmethod used above is the most convenient one to use in deducing the conditions

imposed on the moduli in all the classes except those belonging to the trigonal

and ...

Page 281

(vii)

trigonal and

regarded as forming a single system. In some systems (for example, the

tetragonal) ...

(vii)

**hexagonal**: Oz parallel to the 6-fold axis; a = 6 ^c, a = 0 = 90°, y = 120°. Thetrigonal and

**hexagonal**systems, having similar sets of axes, are sometimesregarded as forming a single system. In some systems (for example, the

tetragonal) ...

Page 283

These three systems are accordingly said to be biaxial. For tetragonal, trigonal

and

one circular central section. The normal to this section, which is the axis of

revolution, ...

These three systems are accordingly said to be biaxial. For tetragonal, trigonal

and

**hexagonal**crystals the indicatrix is an ellipsoid of revolution and has onlyone circular central section. The normal to this section, which is the axis of

revolution, ...

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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