Which of the following information(s) is/are incorrect regarding the voids formed in three-dimensional HCP of identical spheres?

A tetrahedral void is formed when a sphere of the second layer is present above the triangular void of the first layer

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All the triangular voids are not covered by the spheres of the second layer

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Tetrahedral voids are formed when the triangular voids in the second layer lie above the triangular voids in the first layer and the triangular shapes of these voids do not overlap

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Octahedral voids are formed when the triangular voids in the second layer exactly overlap with similar voids in the first layer

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Solution

The correct options are
C Tetrahedral voids are formed when the triangular voids in the second layer lie above the triangular voids in the first layer and the triangular shapes of these voids do not overlap
D Octahedral voids are formed when the triangular voids in the second layer exactly overlap with similar voids in the first layer

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Similar questions

Which of the following is not true about the voids formed in 3 dimensional hexagonal close packed structure ?

(a) A tetrehedral void is formed when a sphere of the second layer is present above triangular void in the first layer

(b) All the triangular voids are not covered by the spheres of the second layer

(c) Tetrahedral voids are formed when the triangular voids in the second layer lie above the triangular voids in the first layer and the triangulare shapes of these voids do not overlap

(d) Octahedral voids are formed when the triagular voids in th second layer exactly overlap with similar voids in the first layer

Which of the following statement is not true about the hexagonal close packing ?

(a) The coordination number is 12

(b) It has 74% packing efficiency

(d) In this arrangement spheres of the fourth layer are exactly aligned with those of the first layer

Q. What are triangular voids?Is these voids are formed 1D?formula for finding these voids

Q. Is it possible to have a closed packed structure with hexagonal layers such that the atoms of second layer overlap the atoms of first layer , instead of overlapping the triangular voids ? ( like we do with square packed layers )

We say that tetrahedral voids are called so because a tetrahedron is formed when the centres of four spheres are joined.

Then shouldn't we call the voids surrounded by SIX spheres as HEXAHEDRAL voids?!

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