An example of fluorite structure is:

Options

A. NaF
B. `SrF_(2)`
C. `AICI_(3)`
D. `SiF_(4)`

Answer

To solve the question regarding the example of a fluorite structure, we need to understand the characteristics of the fluorite structure and analyze the given options.

### Step-by-Step Solution:

1. **Understanding Fluorite Structure**:
- The fluorite structure is characterized by the formula AB2, where A is the cation and B is the anion.
- A common example of a compound with a fluorite structure is calcium fluoride (CaF2).

2. **Analyzing the Given Options**:
- We have the following options: NaF, SrF2, AlCl3, and SiF4.
- We need to determine which of these compounds fits the AB2 structure.

3. **Checking Each Option**:
- **NaF**: This has a 1:1 ratio of Na+ to F-, which does not fit the AB2 structure.
- **SrF2**: This has a 1:2 ratio of Sr2+ to F-, which fits the AB2 structure.
- **AlCl3**: This has a 1:3 ratio of Al3+ to Cl-, which does not fit the AB2 structure.
- **SiF4**: This has a 1:4 ratio of Si4+ to F-, which does not fit the AB2 structure.

4. **Conclusion**:
- Among the given options, **SrF2** is the only compound that fits the fluorite structure (AB2 type).

### Final Answer:
The example of fluorite structure is **SrF2**.

---