Question

3. How many tetrahedral and octahedral voids are there for each sphere?

Answer 1

Suppose N is the sphere.
Then no. of tetrahedral voids is equals to 2N
& No. of octahdral void is N.
That means there 2 tetrahedral voids for each sphere. & one octahedral void for each sphere.

Answer 2

Tetrahedral and octahedral voids are there for each sphere

Explanation:

• Each sphere has 8 tetrahedral empty spaces and 4 octahedral void spaces in close packing.

• Assume N is a sphere.

• Then the number of tetrahedral voids equals 2N.

• & N is the number of octahedral voids.

• That means each sphere has two tetrahedral vacancies. Each sphere has one octahedral vacancy.