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Acompound of formula A_{2}B_{3}  has  the hcp lattice Which atom forms the hcp lattice and what fraction of tetra hedral voids is occupied by the other atoms:

  • Option 1)

    hcp lattice -B ,\frac{2}{3}  tetrahedral voids

     

  • Option 2)

    hcp lattice -A , \frac{1}{3} tetrahedral voids -B

  • Option 3)

    hcp lattice -B , \frac{1}{3}  Tetrahedral voids -A

  • Option 4)

    hcp lattice - A ,\frac{2}{3} Tetrahedral voids -B

Answers (1)

best_answer

 

Tetrahedral Voids -

Voids form by touching 4 spheres , 3 in the same plane and one in lower or upper plane is known as tetrahedral void.

 

\frac{r}{R} = 0.225

- wherein

r = radius of void

R = radius of atom

 

 

 

Voids -

Voids are empty spaces in a unit cell. They are of four types: triangular, tetrahedral, octahedral, cubic.

-

 

 


Option 1)

hcp lattice -B ,\frac{2}{3}  tetrahedral voids

 

Option 2)

hcp lattice -A , \frac{1}{3} tetrahedral voids -B

Option 3)

hcp lattice -B , \frac{1}{3}  Tetrahedral voids -A

Option 4)

hcp lattice - A ,\frac{2}{3} Tetrahedral voids -B

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