“…For the initial two morphologies, ripple formation to wrinkle transformation presentcommon surface behavior as those reported previously on transparent dielectrics irradiated at low-medium energies including SiO 2 [6,19,51,52], soda-lime [18,53], Al 2 O 3 [54,55], Si 3 N 4 [20,21,55], muscovite [22] and at high energies in SiO 2 [7,8]. In these cases, for q < 75 o the ripple and wrinkle wave vectors are parallel to the ion beam projection onto the surface [52,53].…”