The stacking pattern of a simple cubic structure is

Options

A. `ABCABC`
B. `ABABAB…..`
C. `"AAAAAA"….`
D. `"AABBAA"….`

Explanation

To understand the stacking pattern of a simple cubic structure, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding the Simple Cubic Structure**:
- In a simple cubic structure, the unit cell is a cube. The atoms are located at each of the eight corners of the cube.

2. **Visualizing the Arrangement**:
- Imagine the atoms as spheres. In a two-dimensional representation, these spheres are arranged in a square pattern, where each corner of the square represents an atom.

3. **Layering the Atoms**:
- When we stack these spheres in three dimensions, we can visualize the first layer of atoms (let's call it layer A) being placed at the corners of the cube.

4. **Identifying the Second Layer**:
- The second layer of atoms is also placed in the same manner as the first layer. Therefore, the second layer is also designated as layer A.

5. **Continuing the Stacking**:
- This pattern continues for the third layer, which again is layer A. Thus, all layers in a simple cubic structure are identical and follow the same arrangement.

6. **Final Stacking Pattern**:
- The stacking pattern can be represented as A-A-A, indicating that every layer is the same (layer A).

### Final Answer:
The stacking pattern of a simple cubic structure is A-A-A, where all layers are identical.