NEET2016ChemistrySolid StateActual
In calcium fluoride, having the fluorite structure, the coordination numbers for calcium ion C a 2 + and fluoride ion F - are
Options
- A4   and   2
- B6   and   6
- C8   and   4
- D4   and   8
Correct answer
C. 8   and   4
Step-by-step solution
In C a F 2 ,   C a 2 + has FCC arrangement and F -   ions are present in all tetrahedral voids. ∴ Co-ordination numbers for C a 2 + and F - ions are 8   and   4 .