Long‐period and hexagonal shear domain structures co‐existing with the Cu₃Ti₂ phase

The long period structures co‐existing with the Cu₃Ti₂ phase are investigated by means of electron diffraction and high resolution electron microscopy. The arrangement of ordered Ti atoms in these structures, which are formed as different stacking variants of copper and titanium layers on the (001) planes, can be read off directly from the [100] zone high resolution superstructure image. The [100] zone images reveal moreover a structure built from quasi‐close, packed planes parallel with (110) planes. A model of a quasi‐hexagonal close packed structure which is consistent with all observed diffraction and imaging results relative to this structure is proposed and its relation, with the long period structures is discussed.