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

1.	Which of the following statement is not true about the hexagonal close packing ?
Answer» The coordination number is 12. It has 74% PACKING efficiency . Tetrahedral voids of the second layer are covered by the spheres of the third layer. In this arrangement spheres of the fourth layer are exactly aligned with those of the FIRST layer. Solution :In hexagonal close packing , arrangement is ABAB ….. Types and not ABC ABC ……type. Hence, (d) is not TRUE.

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