The coordination numbers in cubic close-packed, body-centered cubic,
And primitive cubic structures are,
Respectively,
A) 12, 8, and 12.
B) 12, 8, and 4.
C) 8, 12, and 6.
D) 12, 6, and 6.
E) 12, 8, and 6.

Question

Quizplus · Accepted Answer

- In a cubic close-packed structure, each atom is surrounded by 12 nearest neighbors, giving it a coordination number of 12.
- In a body-centered cubic structure, each atom is surrounded by 8 nearest neighbors, giving it a coordination number of 8.
- In a primitive cubic structure, each atom is only in contact with its 6 nearest neighbors, giving it a coordination number of 6.

Therefore, the correct option is E, which gives the coordination numbers for each structure as 12, 8, and 6.

The Coordination Numbers in Cubic Close-Packed, Body-Centered Cubic