The number of tetrahedral voids per unit cell in NaCl crystal is ____

1.	The number of tetrahedral voids per unit cell in NaCl crystal is ____
Answer» 4 8 twice the number of octahedral voids FOUR times the number of octahedral voids . Solution :NaCl has FCC arrangement of `Cl^-` IONS. HENCE, number of `Cl^-` ions in packing per UNIT cell =4. No. of tetrahedral voids is double the number of octahedral voids. Hence, tetrahedral voids =8

Discussion