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A compound of formula

A2 B 2 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 – B, 1/3 Tetrahedral voids A

c.hcp lattice – B, 2/3 Tetrahedral voids A

d. hcp lattice – A, 1/3 Tetrahedral voids B

Ans. b

(11)

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