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

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Page 121

(iv) Trigonal and

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

(iv) Trigonal and

**hexagonal**systems. The direct inspection method used above isthe most convenient one to use in deducing the conditions imposed on the

moduli in all the classes except those belonging to the trigonal and

**hexagonal**...Page 147

CJ3 = (*uT*l2)/'< C41 = i/Slt, where s = s33(sn+sl1)-2s'2i3. Cubic system. (All

classes) c n («u-«m)(*u + 2»ii)' C44 = »/«44- 8. Numerical values of the elastic ...

**Hexagonal**system. (All classes) cn + cu = *>>/*, eu ~ cu = '/(*n- *n), cn = - *u/*,CJ3 = (*uT*l2)/'< C41 = i/Slt, where s = s33(sn+sl1)-2s'2i3. Cubic system. (All

classes) c n («u-«m)(*u + 2»ii)' C44 = »/«44- 8. Numerical values of the elastic ...

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, ae = /3 = 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) ...

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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