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

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Page 24

(iv)

quadric parallel to the crystallographic diad axis, and we notice that, when this is

done, the quadric has all the symmetry elements that are found in the classes of ...

(iv)

**Monoclinic**system. Here we must arrange one of the diad axes of the generalquadric parallel to the crystallographic diad axis, and we notice that, when this is

done, the quadric has all the symmetry elements that are found in the classes of ...

Page 109

A

63, c = 13-23 A, 0 = 134° 48'. X-ray measurements of the coefficients of thermal

expansion normal to certain planes hOl gave the following results: h_ 0 I oc h 0 l_

...

A

**monoclinic**crystal (afwillite) has the following cell dimensions: a = 16-21, 6 = 5-63, c = 13-23 A, 0 = 134° 48'. X-ray measurements of the coefficients of thermal

expansion normal to certain planes hOl gave the following results: h_ 0 I oc h 0 l_

...

Page 158

Principal coefficients and directions for a

method. Suppose it is required to find the coefficients for some second-rank

tensor property in a

expansion.

Principal coefficients and directions for a

**monoclinic**crystal. Least squaresmethod. Suppose it is required to find the coefficients for some second-rank

tensor property in a

**monoclinic**crystal. For definiteness let us choose thermalexpansion.

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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