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Introduction to Imperfections in Solids

In a face cen...

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In a face centered unit cell with all the positions occupied by A atoms, the body centered octahedral hole in it occupied by an atom B of an appropriate size. Calculate the void space per unit volume of unit cell for such crystal.

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Q. In a face-centered unit cell with all the positions occupied by A atoms, the body-centered octahedral holes in it are occupied by an atom B of an appropriate size.
Calculate the void fraction per unit volume of a unit cell for such crystal.

Q. In a face centred lattice with all the positions occupied by

A

atoms, the body centred octahedral holes in it is occupied by an atom

B

of an appropriate size for such a crystal. Predict the formulae of the compound.

Q. Unit cells can be divided into two categories, primitive and centered unit cells.
(a) Differentiate between Unit Cell and Crystal Lattice?
(b) Calculate the number of atoms per unit cell in the following:
(i) Body centered cubic unit cell (bcc)
(ii) Face centered cubic unit cell (fcc)

Q. The number of octahedral void(s) per atom present in a face - centered cubic unit cell is:
[1 mark]

How much volume is occupied by spheres of a face centered cubic unit cell?

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