| Abstract
| - Deformation in very thin crystal has been studied on laminar crystals of colloidal gold, of about 1CO Å in thickness and with (111) orientation, grown in dislocations being seldom found. Prominent elastic bending is often seen. From the estimation of the curvature, it is concluded that the crystals are capable of being deformed elastically as far as the theoretical strength. At the beginning of plastic deformation, {111} twins are formed mechanically, their thickness is several ten Angstroms being determined from the subsidary maxima of diffraction twin spots. As the deformation proceeds, thickening of twins occurs. {111} slip is also observed.
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