If Z is the number of atoms in a unit cell that represents the closest packing sequence ABC ABC ... , the number of tetrahedral voids in the unit cell is equal to:
Correct answer: B. 2Z
- A. Z
- B. 2Z
- C. Z/2
- D. Z/4
Explanation
As we know, Number of tetrahedral voids in the unit cell = 2 × number of atoms Number of atoms = Z Number of tetrahedral voids in the unit cell = 2 x Z = 2Z Hence, option B is correct.
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Crystalline solids contain particles arranged in a regular repeating lattice described by a unit cell. Their study includes coordination number, packing efficiency, density, anisotropy, cleavage, polymorphism and common crystal systems, along with ionic, molecular, covalent network and metallic crystals. Crystalline order differs from the random arrangement of amorphous solids.
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