The number of octahedral voids in a unit cell of a cubical closest packed structure is

The position in a closed packed unit cell where a foreign atom is in contact with six host atoms in the form of an octahedral is called octahedral void. No. of effective void = no. of effective host atom = 4 Types of ionic structures 87. The number of Cl– ions around one Na⁺ in NaCl crystal lattice is (a) 10 (b) 12 (c) 8 (d) 6 NaCl follows f.c.c lattice. Here, each Na is surrounded by six C l ions and vice-versa. There exists the large group of ions that are fixed together with the help of electrostatic forces in between the ions. Hence, the number