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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
In `NaCl^(-)`, ions have fcc arrangement and number of `Cl^(-)` ions per unit cell = 4. Number of tetrahedral voids will be `4 xx 2 = 8`
Tetrahedral voids are double the number of octahedral voids.
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