Questions
Which of the following is not true about the voids formed in three dimensional hexagonal close packed structure?
detailed solution
Correct option is C
Tetrahedral voids are formed when the sphere of the second layer lie exactly above the triangular voids in the first layer.Octahedral voids are formed when triangular void of second layer lie above the triangular voids in the first layer but it does not cover the void completely.The triangular shape of there voids are opposite of each other.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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