Which of the following statements is(are) correct?

Options

A. The coordination number of each type of ion in CsCl crystal is 8
B. A metal that crystallizes in bcc structure has a coordination number 12
C. A unit cell of an ionic crystal shares some of its ions with other unit cells
D. The length of the unit cell in NaCl is 552 pm
`( r_(Na^(+)) = 95 "pm" , r_(Cl^(-)) = 181 "pm" )`

Explanation

To determine which of the statements regarding solid-state chemistry are correct, we will analyze each statement step by step.

### Step-by-Step Solution:

1. **Statement 1: The coordination number of each type of iron in cesium chloride crystal is 8.**
- In a cesium chloride (CsCl) crystal structure, each cesium ion (Cs⁺) is surrounded by 8 chloride ions (Cl⁻), and each chloride ion is surrounded by 8 cesium ions. This means that the coordination number for both Cs⁺ and Cl⁻ is indeed 8.
- **Conclusion:** This statement is **correct**.

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