planar packing density, planar atomic density
võreelemendi kristallograafiatasandi aatomite arvu või nende pindala suhe võreelemendi tasandi pindalasse (vt kristallivõre, pakketihedus; vrd ruumpakketihedus, joonpakketihedus), a density of atoms in a crystal plane defined as the number of atoms or ratio of area of atoms per unit area on a crystal plane (see: unit cell, packing density; compare: volumetric atomic density, linear atomic density)
