The microstructure of molybdenum disulphide and tungsten disulphide un
supported catalysts has been characterized by high-resolution electron
microscopy. Lattice resolution of edge planes shows the typical layer
ed structure, however in this case, additional plane curvature and dis
locations am seen. The material shows a micro-domain arrangement where
planes like (101), (103) and (105) are identified based in the interp
lanar spacings. In other cases the (002) basal plane was found to exhi
bit plane shifts or kinks.