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Question

The space lattice of diamond is:


A
fcc
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B
bcc with two atoms per unit cell
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C
bcc with 4 atoms per unit cell
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D
simple cubic
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Solution

The correct option is C fcc


The diamond lattice consists of a face-centred cubic Bravais point lattice which contains two identical atoms per lattice point. 

The distance between the two atoms equals one-quarter of the body diagonal of the cube. The diamond lattice represents the crystal structure of diamond, germanium and silicon. 

The diamond lattice contains also 4 lattice point per unit cell but contains 8 atoms per unit cell tetrahedrally bonded atoms in each primitive cell.


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Chemistry

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