The radius ratio of KF is 0.98. The structure of KF is of the type

Options

A. `NaCl`
B. `ZnS`
C. `CsCl`
D. `CaF_(2)`

Answer

To determine the structure of KF based on its radius ratio, we can follow these steps:

### Step 1: Understand the Radius Ratio
The radius ratio is defined as the ratio of the radius of the cation (r⁺) to the radius of the anion (r⁻). It is given by the formula:
\[ \text{Radius Ratio} = \frac{r^+}{r^-} \]

### Step 2: Identify the Given Radius Ratio
In this case, the radius ratio of KF is given as 0.98.

### Step 3: Refer to the Radius Ratio Table
We need to refer to a standard table that correlates radius ratios with coordination numbers and structures.

### Step 4: Analyze the Radius Ratio
From the standard radius ratio table:
- A radius ratio of 0.98 falls within the range of 0.732 to 1.0.
- This range corresponds to a coordination number of 8.

### Step 5: Identify the Structure Type
For a coordination number of 8, the structure typically corresponds to the CsCl (Cesium Chloride) type structure.

### Conclusion
Thus, the structure of KF, with a radius ratio of 0.98, is of the CsCl type.

### Final Answer
The structure of KF is of the type CsCl.

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