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In face-centred cubic unit cell :...

In face-centred cubic unit cell :

A

face diagonal of the cube is `asqrt(2)` or `4r`
(a=edge length, r=radius of constituent units)

B

effective number of atoms in the unit cell is 4

C

8 tetrahedral voids per unit cell

D

rank of the unit cell is 3

Text Solution

Verified by Experts

The correct Answer is:
A, B
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Knowledge Check

  • In a face-centred cubic unit cell, edge length is

    A
    `4/sqrt3 r`
    B
    `4/sqrt2 r`
    C
    `2r`
    D
    `sqrt3/2 r`

  • The number of spheres contained in (i) one body-centred cubic unit cell and (ii) one face-centred cubic unit cell, are

    A
    2 in (i) and 4 in (ii)
    B
    3 in (i) and 2 in (ii)
    C
    4 in (i) and 2 in
    D
    2 in (i) and 3 in(ii)

  • In a face- centred cubic unit cell, the edge length is

    A
    `4/(sqrt3) r`
    B
    `4/(sqrt2) r`
    C
    `2 r`
    D
    `(sqrt3)/2 r`