For a value of radius ratio between `0.414 - 0.732`, what is the co-ordination number and the geometry of the crystal?

Explanation

To solve the question regarding the coordination number and geometry of the crystal for a radius ratio between 0.414 and 0.732, we can follow these steps:

### Step-by-Step Solution:

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-).
- Mathematically, it is expressed as:
\[
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