The intermetallic compound LiAg has a cubic crystalline structure in which each Li atom has 8 nearest-neighbour silver atoms and vice-versa. What is the type of unit cell?

JEE Main Chemistry question

Not in JEE Main or NEET syllabus

The intermetallic compound has a cubic crystalline structure in which each atom has 8 nearest-neighbour silver atoms and vice-versa. What is the type of unit cell?

(A)Body-centred cubicCorrect
(B)Face-centred cubic
(C)Simple cubic for either Li atoms alone or Ag atoms alone
(D)None of the above

Answer: (A)

Solution

A coordination number of 8 for each type of atom, with every surrounded only by neighbours (and vice-versa), is exactly the -type arrangement: one species occupies the corners of the cube and the other occupies the body centre. Following the same convention used for itself, this two-atom

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Question ID VK-141727