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

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Page 114

Contrary to our convention Voigt counts compressive stresses as

introduces a minus Bign into equation (17) ; as a result Voigt 's dtj are identical

with our Wooster (1938) uses a different notation: our are equal to Wooster's qji ...

Contrary to our convention Voigt counts compressive stresses as

**positive**, but heintroduces a minus Bign into equation (17) ; as a result Voigt 's dtj are identical

with our Wooster (1938) uses a different notation: our are equal to Wooster's qji ...

Page 125

t The sense of the x, axis is conventionally fixed (Standards on piezoelectric

crystals, 1949) by ruling that in right-handed quartz the

develops a negative charge on extension (and theroforo a

t The sense of the x, axis is conventionally fixed (Standards on piezoelectric

crystals, 1949) by ruling that in right-handed quartz the

**positive**end of the x, axisdevelops a negative charge on extension (and theroforo a

**positive**charge on ...Page 128

7.5 a for a

appropriate for left-handed quartz. Thus, in such a crystal, a tensile stress along

Ox1 produces a

direction ...

7.5 a for a

**positive**value of dn. As we have seen (footnote, p. 125), this isappropriate for left-handed quartz. Thus, in such a crystal, a tensile stress along

Ox1 produces a

**positive**charge towards the**positive**end of the Ox1 axis. As thedirection ...

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### Contents

THE GROUNDWORK OF CRYSTAL PHYSICS | 3 |

EQUILIBRIUM PROPERTIES | 51 |

ELECTRIC POLARIZATION | 68 |

69 other sections not shown

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### Common terms and phrases

angle anisotropic applied biaxial birefringence centre of symmetry Chapter coefficients conductivity crystal classes crystal properties crystal symmetry cube cubic crystals defined denoted diad axis dijk direction cosines electric field electro-optical effect ellipsoid equal equation example expression follows force given gives heat flow Hence hexagonal indicatrix isothermal isotropic lattice left-handed magnetic magnitude matrix notation measured moduli monoclinic number of independent Onsager's Principle optic axis optical activity orientation permittivity perpendicular photoelastic effect piezoelectric effect plane plate point group positive principal axes produced pyroelectric effect quadric quantities radius vector referred refractive index relation representation quadric represents right-handed rotation scalar second-rank tensor set of axes shear shown shows strain stress suffix notation symbol 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