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  • Need explanation for: The coordination number and distance between nearest neighbour in BCC structure is

The coordination number and distance between nearest neighbour in BCC structure is

  • Option 1)

    6 ,  \frac{a\sqrt{3}}{4}

  • Option 2)

     8 , \frac{a\sqrt{3}}{4}

  • Option 3)

    6 , \frac{a\sqrt{3}}{2}

  • Option 4)

    8 , \frac{a\sqrt{3}}{2}

 

Answers (1)

The 8 corner atoms are in contact with body centred atom in BCC structure. Hence its coordination number is 8 and distance between a corner and body centre is \frac{a\sqrt{3}}{2}

 

 

Coordination number -

Total number of atom touching a particular atom in the given unit cell is known as coordination number and that atoms are known as nearest neighbour.

- wherein

                Unit cell                      Coordination number

  1. Primitive                              6
  2. BCC                                    8
  3. FCC                                    12
  4. HCP                                    12

 

 

 

Coordination number -

Total number of atom touching a particular atom in the given unit cell is known as coordination number and that atoms are known as nearest neighbour.

- wherein

                Unit cell                      Coordination number

  1. Primitive                              6
  2. BCC                                    8
  3. FCC                                    12
  4. HCP                                    12

 

 


Option 1)

6 ,  \frac{a\sqrt{3}}{4}

This is incorrect

Option 2)

 8 , \frac{a\sqrt{3}}{4}

This is incorrect

Option 3)

6 , \frac{a\sqrt{3}}{2}

This is incorrect

Option 4)

8 , \frac{a\sqrt{3}}{2}

This is correct

Posted by

Vakul

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