It was recalled that the (113) face was very stable, due to the rehybridization of dangling bonds. It was shown that the adsorption of atomic H disturbed this stability. Models were presented for the structure of the resultant mixed, 2 x 2 plus 2 x 3, surface

J.H.Wilson, P.D.Scott, J.B.Pethica, J.Knall: Journal of Physics - Condensed Matter, 1991, 3[SA], S133-8