the smallest values of integers (the symbols h, k, l) proportional to the reciprocals of the intercepts of the plane on the three crystal axes; these planes are planes of the highest density of atoms (see: Miller indices, Miller-Bravais indices), Milleri indeksite (h, k, l) vähimate võimalike numbritega tasandid kristallivõres, milliseid iseloomustab aatomite suurim pakketihedus (vt Milleri indeksid, Miller-Bravais indeksid)