The total number of tetrahedral voids in the face centred unit cell is _______.
[1 Mark]

6

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8

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10

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12

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Solution

The correct option is B $8$
Total number of atoms in one face centered unit cell
$= 8 \times \frac{1}{8} + 6 \times \frac{1}{2} = 4$
Therefore, the total number of tetrahedral voids in the face centred unit cell $= 2 \times 4 = 8$

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Similar questions

The total number of tetrahedral voids in the face centred unit cell is ................

(a) 6 (b) 8 (c) 10 (d) 12

List-I (Solids)	List-II (Unit cell)	List-III (Coordination number)
(a) Rock salt	(p) Face-centred cubic, anion in tetrahedral void	(w) 6
(b) Fluorite	(q) Face-centred cubic, cation in octahedral void	(x) Cation (8), anion (4)
(c) Agl, ZnS	(r) Face-centred cubic, cation in alternate tetrahedral void	(y) Cation (4), anion (8)
(d) $N a_{2} O$	(s) Face-centred cubic, cation in tetrahedral void	(z) Cation (4), anion (4)

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