Physical Properties of Crystals |
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Page 79
... centre of symmetry , a fact which provides a practical method of testing for the absence of a centre . A little thought shows that a pyroelectric moment can only lie along a direction in a crystal which is unique , in the sense that it ...
... centre of symmetry , a fact which provides a practical method of testing for the absence of a centre . A little thought shows that a pyroelectric moment can only lie along a direction in a crystal which is unique , in the sense that it ...
Page 118
... symmetry elements possessed by the crystal . Then the coefficients describing the effect must be the same after trans- formation as before . ( i ) Centre of symmetry . To illustrate the method let us first consider again a crystal ...
... symmetry elements possessed by the crystal . Then the coefficients describing the effect must be the same after trans- formation as before . ( i ) Centre of symmetry . To illustrate the method let us first consider again a crystal ...
Page 279
... symmetry elements are accordingly called point groups . † It may be shown by inspection of the 230 space groups , or ... centre of a reference sphere ; ( ii ) the orientations of the symmetry elements are determined by their inter ...
... symmetry elements are accordingly called point groups . † It may be shown by inspection of the 230 space groups , or ... centre of a reference sphere ; ( ii ) the orientations of the symmetry elements are determined by their inter ...
Contents
THE GROUNDWORK OF CRYSTAL PHYSICS | 11 |
EQUILIBRIUM PROPERTIES | 45 |
PARAMAGNETIC AND DIAMAGNETIC SUSCEPTIBILITY | 53 |
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Common terms and phrases
angle anisotropic applied biaxial birefringence centre of symmetry Chapter coefficients components conductivity constant crystal classes crystal properties crystal symmetry cube cubic crystals D₁ defined deformation denoted diad axis dielectric dijk displacement electric field ellipsoid equal equation example expression follows forces given grad H₁ heat flow Hence hexagonal indicatrix isothermal isotropic k₁ magnetic magnitude matrix notation measured moduli monoclinic number of independent Onsager's Principle optic axis optical activity orientation orthorhombic Ox₁ P₁ parallel Peltier permittivity perpendicular photoelastic photoelastic effect piezoelectric effect plane plate polarization positive principal axes pyroelectric effect quadric radius vector referred refractive index relation representation quadric represents right-handed rotation S₁ scalar second-rank tensor shear shown strain stress suffixes symmetry elements Table temperature gradient thermal expansion thermodynamics thermoelectric effects Thomson heat tion transformation law triclinic trigonal uniaxial values wave normal wave surface x₁ Young's Modulus zero ат