Physical Properties of Crystals |
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Page 20
... symmetry of its physical properties . The key to this question is a fundamental postulate of crystal physics , known as Neumann's Principle . It may be stated as follows : The symmetry elements of any physical property of a crystal must ...
... symmetry of its physical properties . The key to this question is a fundamental postulate of crystal physics , known as Neumann's Principle . It may be stated as follows : The symmetry elements of any physical property of a crystal must ...
Page 21
... element or not . First we measure the property relative to some fixed axes . Then we operate with the potential symmetry element on the crystal , † and again investigate the relation between the measured quantities , taking our ...
... element or not . First we measure the property relative to some fixed axes . Then we operate with the potential symmetry element on the crystal , † and again investigate the relation between the measured quantities , taking our ...
Page 279
... symmetry they possess . Enumeration of the 32 point groups and crystal classes . The symmetry elements of the 32 point groups are shown in Table 21 ( pp . 284-8 ) by means of stereographic projections . For the purposes of Table 21 the ...
... symmetry they possess . Enumeration of the 32 point groups and crystal classes . The symmetry elements of the 32 point groups are shown in Table 21 ( pp . 284-8 ) by means of stereographic projections . For the purposes of Table 21 the ...
Contents
THE GROUNDWORK OF CRYSTAL PHYSICS | 11 |
EQUILIBRIUM PROPERTIES | 51 |
16 | 59 |
23 other sections not shown
Common terms and phrases
angle anisotropic applied biaxial birefringence centre of symmetry Chapter coefficients 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 P₂ parallel Peltier permittivity perpendicular 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 symmetry elements Table temperature gradient thermal expansion thermodynamics thermoelectric effects Thomson heat tion transformation law triclinic trigonal uniaxial unit volume values wave normal wave surface x₁ Young's Modulus zero