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A compound of formula A(2)B(3) has the h...

A compound of formula `A_(2)B_(3)` has the hcp lattice. Which atom forms the hcp lattice and what fraction of tetrahedral voids is occupied by the other atoms :

A

hcp lattice `-A, (2)/(3)` Tetrahedral voids -B

B

hcp lattice `-A, (1)/(3)` Tetrahedral voids -B

C

hcp lattice -B, `(2)/(3)` Tetrahedral voids-A

D

hcp lattice `-B, (1)/(3)` Tetrahedral voids-A

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