certain properties of the topochemical Stone-Wales defect. The rolling-up of a planar graphene sheet into a small-diameter nanotube led to an approximately 0.6eV decrease in defect formation energy. The Stone-Wales defect localized states were resonant with nanotube energy spectrum. In the case of fracture-type deformation, the Stone-Wales defect on the compressed side of the tube was energetically favorable. At a fracture angle above critical value-yield point (1.7° for (8,0), 2.7° for (5,5)), Stone-Wales defect appearance decreased the total energy of the tube. Thus, fracturing deformation of the nanotube turns on a plasticity channel in the form of mechanical generation of the Stone-Wales defect. Stone-Wales Defect Generation in Carbon Nanotube Being Fractured. S.S.Moliver: Fullerenes Nanotubes and Carbon Nanostructures, 2012, 20[4-7], 531-7