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In diamond, each carbon atom is bonded t...

In diamond, each carbon atom is bonded to four other carbon atoms tetrahedrally. The number of carbon atoms per unit cell is

A

4

B

6

C

12

D

8

Text Solution

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The correct Answer is:
D
Structure of diamond can be visualised as an g.c.c. arrangement of carbon atoms in which carbon atoms are also present in alternate tetrahedral sites. In such a way each carbon atom has a C.N.of 4.
No. of atoms per unit cell
=`8times1/8+6times1/2+4times1`
=`1+3+4=8`
(Eight corners, six face centres and half of the 8 tetrahedral sites)
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