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the number of tetrahedral voids per uni...

the number of tetrahedral voids per unit cell in NaCl crystal is ………… .

A

4

B

8

C

twice the number of octahedral voids

D

four times the number of octahedral voids

Text Solution

Verified by Experts

The correct Answer is:
B,C
NaCl has fcc arrangment of `Cl^(-)` ions. Thus, Number of `Cl^(-)` ions in pakcing per unit cell=4 Number of tetrahedral voids
`=2xx` No. of particles present in close packing
`=2xx4=8`
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NARAYNA-SOLID STATE-LEVEL-IV
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