The (3 x 3) reconstruction of the InSb(111) surface was investigated by grazing incidence X-ray diffraction and scanning tunnelling microscopy. The structure was characterized by 6-atom rings on top of a slightly buckled InSb top double layer. Two types of rings were found, an elliptic ring consisting of 4 In and 2 Sb atoms and a trigonal ring with 3 In and 3 Sb atoms. The bond angles and lengths were consistent with the concept of rehybridization and depolarization which explains the reconstructions of the (111) and (110) surfaces.

A New Type of Reconstruction on the InSb (111) Surface Determined by Grazing Incidence X-Ray Diffraction. J.Wever, H.L.Meyerheim, W.Moritz, V.Jahns, D.Wolf, H.Schulz, L.Seehofer, R.L.Johnson: Surface Science, 1994, 321[3], L225-32