In `CaF_2` crystal, `Ca^(2+)` ions are present in FCC arrangment . Calculate the number of `F^-` ions in the unit cell.

Explanation

To determine the number of `F^-` ions in the unit cell of `CaF_2`, we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Arrangement of Ions**:
- In `CaF_2`, the `Ca^(2+)` ions are arranged in a face-centered cubic (FCC) structure. This means that the `Ca^(2+)` ions occupy the lattice points of the FCC unit cell.

2. **Calculate the Number of `Ca^(2+)` Ions in the Unit Cell**:
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