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In AB2 crystal , A2+ ion arrange in CCP manner and B- occupy all tetrahedral voids , if radius of A2+ ion is 100 pm then the radius of B-  ion is

  • Option 1)

    22.5 pm

  • Option 2)

    41.4 pm

  • Option 3)

    20.7 pm

  • Option 4)

    73.2 pm

 

Answers (1)

\frac{radius\; of\; tetrahedral\; void}{radius\; of\; atom}=0.225

radius\; of\; void=100\times 0.225=22.5pm

 

 

Tetrahedral Voids -

Voids form by touching 4 spheres , 3 in the same plane and one in lower or upper plane is known as tetrahedral void.

 

\frac{r}{R} = 0.225

- wherein

r = radius of void

R = radius of atom

 

 


Option 1)

22.5 pm

This is correct

Option 2)

41.4 pm

This is incorrect

Option 3)

20.7 pm

This is incorrect

Option 4)

73.2 pm

This is incorrect

Posted by

subam

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