For cubic structure of diamond: (A) Effective number of atoms present in a diamond cubic cell is 8. (B) Each carbon is surrounded by four nearest carbon atoms. (C) Atomic radius of carbon is (√3 × a)/

Question

For cubic structure of diamond:
(A) Effective number of atoms present in a diamond cubic cell is 8.
(B) Each carbon is surrounded by four nearest carbon atoms.
(C) Atomic radius of carbon is (√3 × a)/8. Where a is edge length of cube.
(D) Packing fraction of unit cell is (√3 × π)/8.
Select the correct option:

Prashant Kotian · Accepted Answer

Correct answer: D. Diamond has ZnS structure. In it r + r =  3 a 4 (Nearest distance is between corner C atom and C atom in tetrahedral void).

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