“…Atomic resolution has been successfully obtained on graphite (Albrecht & Quate, 1988;Sugawara et al, 1991), molybdenum sulfide (Albrecht & Quate, 1988), boron nitride (Albrecht & Quate, 1987), germanium , sapphire (Gan et al, 2007), albite (Drake & Hellmann, 1991), calcite (Ohnesorge & Binnig, 1993) and sodium chloride (Meyer & Amer, 1990). The AFM has also been used to investigate the crystal lattice structure of the tetrahedral layer of clay minerals in 2:1 layer structures, such as muscovite (Drake et al, 1989), illite (Hartman et al, 1990) and montmorillonite (Hartman et al, 1990).…”