The following is not a mineral of Chlorine

Options

A. Carnalite
B. Horn silver
C. Sylvine
D. Cryolite

Answer

To determine which of the given options is not a mineral of chlorine, we need to analyze each option based on its chemical composition.

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are:
- Carnalite
- Horn Silver
- Silvine
- Cryolite

2. **Analyze Carnalite**:
- **Chemical Formula**: Carnalite is represented by the formula KCl·MgCl₂·6H₂O.
- **Chlorine Content**: The presence of KCl and MgCl₂ indicates that Carnalite contains chlorine.
- **Conclusion**: Carnalite is a mineral of chlorine.

3. **Analyze Horn Silver**:
- **Chemical Formula**: Horn Silver is represented by the formula AgCl.
- **Chlorine Content**: The presence of AgCl indicates that Horn Silver contains chlorine.
- **Conclusion**: Horn Silver is a mineral of chlorine.

4. **Analyze Silvine**:
- **Chemical Formula**: Silvine is represented by the formula KCl.
- **Chlorine Content**: The presence of KCl indicates that Silvine contains chlorine.
- **Conclusion**: Silvine is a mineral of chlorine.

5. **Analyze Cryolite**:
- **Chemical Formula**: Cryolite is represented by the formula Na₃AlF₆.
- **Chlorine Content**: Cryolite does not contain chlorine; instead, it contains fluorine (F).
- **Conclusion**: Cryolite is **not** a mineral of chlorine.

6. **Final Answer**: Based on the analysis, the option that is not a mineral of chlorine is **Cryolite**.

### Summary:
The correct answer is **Cryolite** because it does not contain chlorine in its composition.

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