If the coordination number of Ca^{2+} in CaF_ | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) In the $CaF_2$ crystal structure (fluorite structure),each $Ca^{2+}$ ion is coordinated by $8$ $F^{-}$ ions,forming a cubic geometry.Since the sto

Vedclass · Accepted Answer

$4$

Vedclass · Answer

(B) In the $CaF_2$ crystal structure (fluorite structure),each $Ca^{2+}$ ion is coordinated by $8$ $F^{-}$ ions,forming a cubic geometry.Since the stoichiometry of the compound is $1:2$ $(Ca:F)$,the ratio of the coordination numbers must be the inverse of the ratio of the number of ions.Let the coordination number of $Ca^{2+}$ be $CN(Ca^{2+}) = 8$ and the coordination number of $F^{-}$ be $CN(F^{-})$.According to the relation $N_{Ca} 	imes CN(Ca^{2+}) = N_{F} 	imes CN(F^{-})$,where $N$ is the number of ions per unit cell.For $CaF_2$,$1 	imes 8 = 2 	imes CN(F^{-})$.Therefore,$CN(F^{-}) = 4$.

If the coordination number of $Ca^{2+}$ in $CaF_2$ is $8$,then the coordination number of $F^{-}$ ion would be

Similar Questions

What is the coordination number of sodium in $Na_2O$?

In zinc blende structure,the coordination number of $Zn^{2+}$ ion is

For an ionic crystal $A^{+}B^{-}$ with coordination number $6$,the radius ratio will be

Calculate the volume of a unit cell having an atomic radius of $141.4 \ pm$ forming an $fcc$ unit cell.

In a face-centered cubic $(FCC)$ arrangement,atoms $A$ are present at the corners and atoms $B$ are present at the face centers. If $4$ atoms of $A$ are removed from the corners,what is the empirical formula of the compound?

Vedclass Test Series

Exam Paper Generator

Online Exam Module