Issue |
Europhys. Lett.
Volume 46, Number 6, June II 1999
|
|
---|---|---|
Page(s) | 827 - 830 | |
Section | Geophysics, astronomy and astrophysics | |
DOI | https://doi.org/10.1209/epl/i1999-00339-6 | |
Published online | 01 September 2002 |
Mechanical selection of chiral crystals
Collège de France - 11 place M. Berthelot, 75231 Paris Cedex 15, France
Received:
19
October
1998
Accepted:
13
April
1999
A macroscopic chiral crystal (of size larger than one micron), slipping over an inclined solid support, should glide in a direction which differs slightly from the axis of maximum slope. This effect is linked to two factors: a) the crystal is firmly oriented, through the competition between weight forces and friction forces; b) there should exist a preferred direction of slip on the contact facet of the crystal. Similar effects are also expected with a crystal floating on a liquid surface, and driven horizontally by an external force (e.g., an air jet): here, the shape of the wet facet should control the preferred direction of slip.
PACS: 91.65.-n – Geophysical aspects of geology, mineralogy, and petrology / 81.40.Pq – Friction, lubrication, and wear / 92.40.Gc – Erosion and sedimentation
© EDP Sciences, 1999
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