Identify the true statement(s) of the different types of holes in closest packed structures.
1. Trigonal holes are formed by three spheres in the same layer.
2. Tetrahedral holes are formed when a sphere sits in the dimple of four spheres in an adjacent layer.
3. Octahedral holes are formed between two sets of three spheres in adjoining layers of the closest packed structures.

Question

Quizplus · Accepted Answer

1. Trigonal holes indeed are formed by three spheres in the same layer, which is a correct description. 3. Octahedral holes are accurately described as being formed between two sets of three spheres in adjoining layers of the closest packed structures. However, 2 is incorrect because tetrahedral holes are formed by four spheres, where one sphere sits in the dimple of three spheres in an adjacent layer, not four.

Identify the True Statement(s) of the Different Types of Holes