The coordination number of an atom, ion or molecule is the number of constituent particles which touch that particular atom, atom or molecule.
Schottky Defect lowers the density of ionic crystal.
i) The coordination number of cubic close packed structure is 12.
ii) The coordination number of body-centred cubic structure is 8.
In ferromagnetic materials, neighboring dipoles tend to line up in the same direction, whereas in ferrimagnetic materials, neighboring dipoles tend to line up in opposing directions.