1.

Among the following types of voids, which one is the largest void- (A) Triangular system (B) Tetragonal system (C) Monoclinic system (D) Octahedral

Answer»

SOLUTION :(D)
The vacant spaces between the spheres in closed packed structure is called VOID. The voids are of two types, tetrahedral voids and OCTAHEDRAL voids. Also radius of tetrahedral voids and octahedral voids are`r_(void)=0.225xxr_(sphere)`
and `r_(void)=0.411xx r_(sphere)` RESPECTIVELY. Thus, octahedral void is larger than tetrahedral void


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