Structural defects in annealed chalcopyrite single crystals, that had been grown by using the vertical gradient freezing method, were investigated by means of X-ray topography. Dislocations with a Burgers vector of the form, ½[¯1¯11], moving on {112}, of the form, [001], moving on {010} and of the form, <100>, moving on {010}, were identified within the crystals. These contrasted with the preferential activation of ½[¯311] dislocations, moving on {112}, which was observed in the case of the related compound, CuFeS2. Twins which formed due to the motion of pure screw dislocations with a Burgers vector of 1/6[11¯1], moving on {112}, were also observed; as in the case of CuFeS2.

I.Yonenaga, K.Sumino, E.Niwa, K.Masumoto: Journal of Crystal Growth, 1996, 167, 616-20