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Which of the following is not true about...

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

A

A tetrahedral voids 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 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

Text Solution

Verified by Experts

The correct Answer is:
C, D
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Which of the following are not true about hexagonal close packing ?

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which of the following statemets is not true about the hexagonal close packing ?

Knowledge Check

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

    A
    A tetrahdral void is formed when a sphere of the second layer is present above trinaglar void in the first layer.
    B
    All the triangular voids arenot covered by the spheres of the second layer.
    C
    Tetrahedral voids are formed when the traingular voids in the seconds layer lie above the triangular shapes of these boids do not overlap.
    D
    Octadrdral obids are fomed when the traingular voids in the second later exactly overlap with similar voids in the first layer.

  • Which of the following are not true about hexagonal close packing ?

    A
    It has a coordination number of 6.
    B
    It has 26% empty space
    C
    It is ABCABC…. Type of arrangement
    D
    It is as closely packed as body centred cubic packing.

  • Which of the following statements is correct for a two-dimensional haxagonal close-packed layer?

    A
    Each sphere is surrounded by six spheres
    B
    Each sphere is surrounded by six voids
    C
    Each sphere has three voids
    D
    Each voids is surrounded by three spheres