“…Some of the experimental studies focused on the structure and stability of high-Miller-index surfaces during adsorption [5][6][7][8]; others investigated surface reconstructions [9][10][11][12][13] or surface relaxations [14]. The importance of high-Miller-index surfaces (or "vicinal" surfaces as they are frequently called) in surface science was acknowledged by introducing a special notation such that the structure of the denoted crystal planes could be recognized straight forwardly just by their notation (sometimes denoted as the "Somorjai notation") [15].…”