Question

the ratio of coordination number of Na+ and Cl- in face centered cubic lattice crystal of NaCl is
a)6:6
b)6:1
c)1:6
d)3:4

Answer 1

The ratio of coordination no. of Na+ and Cl- in FCC lattice crystal of NaCl is 1:1.

hope this will help you...

Answer 2

Hey there,

● Answer -
CN(Na):CN(Cl) = 6:6

● Explanation -
NaCl is an ionic solid existing in FCC structure.
Each Na cation is surrounded by 4 Cl anions in same plane, and 1 above & below each. i.e. CN = 4+1+1 = 6

Similarly, each Cl anion is surrounded by 4 Na cations in same plane, and 1 above & below each. i.e. CN = 4+1+1 = 6

Therefore, ratio of coordination numbers -
CN(Na) : CN(Cl) = 6 : 6


Hope this solved your query...