## Physical Properties of Crystals |

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Page 68

Corresponding to equation (1) of Chapter III, we have D = ko E-HP, (1) where ko

is a scalar constant, the

rationalized m.k.s. D units of 8.854 × 10-1”.f The vector rela* tion (1) is illustrated

in ...

Corresponding to equation (1) of Chapter III, we have D = ko E-HP, (1) where ko

is a scalar constant, the

**permittivity**of a vacuum, with the numerical value inrationalized m.k.s. D units of 8.854 × 10-1”.f The vector rela* tion (1) is illustrated

in ...

Page 69

express the

we define the dimensionless constant K = k/ko, (4) known as the relative

place of (2), ...

express the

**permittivity**in terms of the**permittivity**of a vacuum. For this purposewe define the dimensionless constant K = k/ko, (4) known as the relative

**permittivity**or the dielectric constant. In an anisotropic substance we have, inplace of (2), ...

Page 73

The ratio of the capacities in the two cases is therefore C o component of D.

parallel to E. k K O' T of T Ko E. -a, --, where k is the

dielectric constant in the direction of the applied field Ee, in the sense defined in

§ 6.1 of ...

The ratio of the capacities in the two cases is therefore C o component of D.

parallel to E. k K O' T of T Ko E. -a, --, where k is the

**permittivity**and K is thedielectric constant in the direction of the applied field Ee, in the sense defined in

§ 6.1 of ...

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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