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Diamond structure is based on a face cen...

Diamond structure is based on a face centred cubic lattice where four out of the eight tetrahedral holes are occupied by carbon atoms. Every atom in this structure is surrounded tetrahedrally by four other carbon atoms. How many carbon atoms per unit cell in diamond structure ?

Text Solution

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There are 8 carbon atoms present per unit cell in diamond, each having a coordination number 4.
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Knowledge Check

  • Ina cubic unit cell, seven of the eight corners are occupied by atoms A and centres of faces are occupied by atoms B. The general formula of the compound is:

    A
    `A_(7)B_(6)`
    B
    `A_(7)B_(12)`
    C
    `A_(7)B_(24)`
    D
    `A_(24)B_(7)`

  • In a cubic unit cell, seven of the eight corners are occupied by atoms A and centres of faces are occupied by atoms B. The general formula of the compound is:

    A
    `A_(7)B_(6)`
    B
    `A_(7)B_(12)`
    C
    `A_(7)B_(24)`
    D
    `A_(24)B_(7)`.

  • Diamond has face-centred cubic lattice of carbon containing carbon atoms in alternate tetrahedral voids. The ratio of the carbon-carbon bond distance to the edge of the unit cell is

    A
    `(sqrt(3))/(4)`
    B
    `sqrt((1)/(4))`
    C
    `1/4`
    D
    `(1)/(sqrt2)`