## Physical Properties of Crystals |

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Page 82

The notion of stress A BODY which is acted on by external

generally, a body in which one part exerts a

to be in a state of stress. If we consider a volume element situated within a

stressed ...

The notion of stress A BODY which is acted on by external

**forces**, or, moregenerally, a body in which one part exerts a

**force**on neighbouring parts, is saidto be in a state of stress. If we consider a volume element situated within a

stressed ...

Page 85

John Frederick Nye. The

perpendicular to Oza are - (... - o - is...}. 821 and (... + or) 3rsèzi, 2 with resultant

ôoia 32.18aa82's. Öza JC2 dog. 1 * (*# 3r) &r, ôon Öof 1 o, - #11.4 &c A (0,-- #

11.4 &c. ***), , .

John Frederick Nye. The

**forces**in the Oz, direction on the two facesperpendicular to Oza are - (... - o - is...}. 821 and (... + or) 3rsèzi, 2 with resultant

ôoia 32.18aa82's. Öza JC2 dog. 1 * (*# 3r) &r, ôon Öof 1 o, - #11.4 &c A (0,-- #

11.4 &c. ***), , .

Page 86

Inhomogeneous stress: illustrating the

moments about the axis Ori. The couple due to the shear components osa is

similarly —ogača, 6a, 6aos.f The equation of motion for rotation about Oz, is

therefore ...

Inhomogeneous stress: illustrating the

**forces**on an element which havemoments about the axis Ori. The couple due to the shear components osa is

similarly —ogača, 6a, 6aos.f The equation of motion for rotation about Oz, is

therefore ...

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### Contents

THE GROUND WORK OF CRYSTAL PHYSICS | 3 |

Summary | 29 |

EQUILIBRIUM PROPERTIES | 45 |

47 other sections not shown

### 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