Tables for
Volume D
Physical properties of crystals
Edited by A. Authier

International Tables for Crystallography (2013). Vol. D, ch. 1.3, p. 77


A. Authiera* and A. Zarembowitchb

aInstitut de Minéralogie et de Physique des Milieux Condensés, 4 Place Jussieu, 75005 Paris, France, and bLaboratoire de Physique des Milieux Condensés, Université P. et M. Curie, 75252 Paris CEDEX 05, France
Correspondence e-mail:

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Stresses applied to the faces surrounding a volume element

[\alpha_{1}], [\alpha_{2}] and [\alpha_{3}] are the direction cosines of the normal n to the small surface QRS.

FaceAreaApplied stressApplied force
QRS [-{\bf T}_{n}] [-{\bf T}_{n}\hbox{ d}\sigma ]
PRS [\hbox{d}\sigma_{1} = \alpha_{1} \hbox{ d}\sigma ] [{\bf T}_{1}] [{\bf T}_{n} \hbox{ d}\sigma_{1} ]
PSQ [\hbox{d}\sigma_{2} = \alpha_{2} \hbox{ d}\sigma ] [{\bf T}_{2}] [{\bf T}_{n} \hbox{ d}\sigma_{2} ]
PQR [\hbox{d}\sigma_{3} = \alpha_{3} \hbox{ d}\sigma ] [{\bf T}_{3}] [{\bf T}_{n} \hbox{ d}\sigma_{3} ]