## Physical Properties of Crystals |

### From inside the book

Results 1-3 of 25

Page 119

us consider what effect a diad axis has on the

parallel to aca. Then the transformation is 21 -> -21, 22 -> −22, 2:3 -> 2.3, or,

more compactly, 1 -> – 1, 2 — —2, 3 -> 3. (23) We must now take the

by ...

us consider what effect a diad axis has on the

**moduli**. Suppose the diad axis isparallel to aca. Then the transformation is 21 -> -21, 22 -> −22, 2:3 -> 2.3, or,

more compactly, 1 -> – 1, 2 — —2, 3 -> 3. (23) We must now take the

**moduli**oneby ...

Page 120

We saw in (ii) above that a diad parallel to as removed all

two 3's. Hence a diad parallel to a, removes all

Therefore, only the following

We saw in (ii) above that a diad parallel to as removed all

**moduli**having no 3's ortwo 3's. Hence a diad parallel to a, removes all

**moduli**having no l's or two 1's.Therefore, only the following

**moduli**remain, dias - dals, data (= dam). In the two ...Page 122

(27) The conditions on the other

are found to be, for a 3-fold or a 6-fold axis, dus = data, dies = -dals, dall = data,

diss = dess = data = data = dass = 0. We have thus found the conditions on the ...

(27) The conditions on the other

**moduli**are derived in a straightforward way andare found to be, for a 3-fold or a 6-fold axis, dus = data, dies = -dals, dall = data,

diss = dess = data = data = dass = 0. We have thus found the conditions on the ...

### What people are saying - Write a review

We haven't found any reviews in the usual places.

### Contents

THE GROUND WORK OF CRYSTAL PHYSICS | 3 |

Summary | 29 |

EQUILIBRIUM PROPERTIES | 45 |

47 other sections not shown

### Other editions - View all

### 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