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Introduction to Imperfections in Solids

A tetrahedral...

Question

A tetrahedral void in fcc is formed by atoms at:

3

corners

+ 1

face-centre

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3

face-centres

+ 1

corner

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2

face-centres

+ 2

corners

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2

face-centres

+ 1

corner

+ 1

body-centre

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Solution

The correct option is C $3$ face-centres $+ 1$ corner
From the figure, it can be seen that a tetrahedral void in fcc is formed by atoms at $3$ face-centres $+$ $1$ corner.

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Similar questions

Unit cell	Definition
(a) Primitive	(i) Contains one constituent at its body-centre other than corners
(b) End-centred	(ii) constituents only at the corners
(c) Face-centred	(iii) constituents at the centre of any two opposite faces other than corners
(d) Body- centred	(iv) constitutents at the centre of each face other than corners
	(v) constitutents only at the centre of cell

X + \frac{1}{4}

A

B

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