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Following three planes (P1, P2, P3) in a...

Following three planes (P1, P2, P3) in an FCC unit cell are shown. Consider the following statements and choose the correct option that follow :

A

`P_(1)` contains no three dimensional voids

B

`P_(2)` contains only octahedral voids

C

`P_(3)` contains both octahedral and tetrahedral voids

D

All are true

Text Solution

Verified by Experts

(A) `P_(1)` represents on the close packed layer having triangular voids only.
(B) `P_(2)` contains location of octahedral voids (edge centres of the unit cell)
(C ) `P_(3)` contains three octahedral void locations (one at body centre and two at edge centre). Also plane P3 contains the body diagonals hence it contains four tetrahedral void location (tetrahedral voids lie at body diagonal)
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