Questions
Statement 1: Total number of octahedral voids present in unit cell of cubic close packing including the one that is present at the body center, is four.
Statement 2: Besides the body center there is one octahedral void present at the center of each of the six faces of the unit cell and each of which is shared between two adjacent unit cells.
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Correct option is C
Since, octahedral void present at body center contribute 1 void while voids present at each edge contribute 1/4 hence total number of octahedral void can be calculated asnumber of octahedral void =1/4×12+1=4.
Similar Questions
Match the type of packing given in Column I with the items given in Column II.
| Column I | Column II | ||
| A. | Square close packing in two dimensions | 1. | Triangular voids |
| B. | Hexagonal close packing in two dimensions | 2. | Pattern of spheres is repeated in every fourth layer |
| C. | Hexagonal close packing in three dimensions | 3. | Coordination number = 4 |
| D. | Cubic close packing in three dimensions | 4. | Pattern of sphere is repeated in alternate layers |
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