Question

explain placing third layer over the second layer......​

Answer 1

Answer:

1.The third layer may be placed above the second layer in a manner such that its spheres cover the octahedral voids.

2.When placed in this manner, the spheres of the third layer are not aligned with. ...

3.Only when fourth layer is placed, its spheres are aligned with those of the first layer.

Answer 2

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The third layer may be placed above the second layer in a manner such that its spheres cover the octahedral voids. When placed in this manner, the spheres of the third layer are not aligned with those of either the first or the second layer. This arrangement is called 'C' type.

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Hope it helps uhh Sistah.! (◕ᴗ◕✿)