Transmission electron microscopic studies at 200C (0.41Tm) of deformed chalcopyrite single crystals revealed a variety of structural defects in the planes {112}, (001) and {100}. In the case of {112}, several glide modes were identified. The majority of dislocations in {112} had (presumably) b = ½<3¯1¯1> and accumulated in separated slip bands of high dislocation density. The line directions and dissociation modes of these dislocations depended upon the orientation of the applied stress. Dislocations of the slip mode, {112}<3¯1¯1>, mainly parallel to <1¯10> or <02¯1>, were dissociated into three non-collinear partials. Dislocations of the slip mode, {112} <¯311>, often parallel to <11¯1>, were dissociated into four non-collinear partials. Dislocations of the subordinate slip mode {112}<¯1¯11> with b = ½{¯1¯11} were commonly screws, dissociated into three collinear partials. Perfect dislocations with b = <¯211> seemed to decompose into pairs of perfect dislocations with b = ½<¯311> and b = ½<¯1¯11>. Dislocations with b = <1¯10> entered {112} planes by cross-slip from (001). The twinning mode, {112}<11¯1>, developed from the movement of dislocations with b = 1/6<11¯1>. Dislocations of the slip mode, (001)<1¯11> were generally split into two collinear partials. Cross-slip into {112} took place with or without recombination of the partials. The slip mode, {100}<010> was activated in the vicinity of high-density {112} slip bands. Dislocations with b = <010> formed square loops with long segments along <021> and were split into two non-collinear partials, b = ¼<021>.

TEM Evidence of Various Glide Modes in Experimentally Strained CuFeS2 Crystals. J.J.Couderc, C.Hennig-Michaeli: Philosophical Magazine A, 1988, 57[2], 301-25