Which of the following adopts normal spinal structure ?

Options

A. CsCI
B. `MgAl_(2)O_(4)`
C. FeO
D. `CaF_(2)`

Explanation

To determine which of the following adopts a normal spinal structure, we need to analyze the options based on the characteristics of spinal structures in solid-state chemistry.

### Step-by-Step Solution:

1. **Understanding Spinal Structures**:
- Spinal structures are a type of mixed oxide with a general formula of either \( A_2B_2O_4 \) or \( AB_2O_4 \). They consist of metal cations and oxide anions arranged in a specific lattice structure.

2. **Identifying the Options**:
- We need to look at the options provided (though not explicitly listed here) and identify which one corresponds to the spinal structure.

3. **Analyzing the Oxidation States**:
- For a compound to adopt a normal spinal structure, it should have specific oxidation states for the metal ions. For example, in \( MgAl_2O_4 \):
- Magnesium (Mg) typically has a +2 oxidation state.
- Aluminum (Al) typically has a +3 oxidation state.

4. **Determining the Coordination**:
- In \( MgAl_2O_4 \):
- The Mg ions occupy tetrahedral sites.
- The Al ions occupy octahedral sites.
- The oxygen ions (O) have a -2 charge and are arranged in a face-centered cubic (FCC) lattice.

5. **Conclusion**:
- Based on the analysis, the compound \( MgAl_2O_4 \) fits the criteria for a normal spinal structure. Therefore, the correct answer is option B.

### Final Answer:
The compound that adopts a normal spinal structure is **B** (assuming \( MgAl_2O_4 \) is option B).