Which of the following mineral does not contain Al?

Options

A. Cryolite
B. Mica
C. Feldspar
D. Fluorspar

Answer

To solve the question of which mineral does not contain aluminum, we will analyze the molecular formulas of each mineral listed in the options.

### Step-by-Step Solution:

1. **Identify the minerals and their formulas:**
- **Cryolite:** The formula is Na3AlF6.
- **Mica:** The formula is Al2K2Si2O10(OH)2.
- **Feldspar:** The formula can be represented as KAlSi3O8 or NaAlSi3O8.
- **Fluorspar:** The formula is CaF2.

2. **Check for the presence of Aluminum (Al):**
- **Cryolite:** Contains Al (sodium aluminum fluoride).
- **Mica:** Contains Al (aluminum silicate).
- **Feldspar:** Contains Al (aluminosilicate).
- **Fluorspar:** Does not contain Al (calcium fluoride).

3. **Conclusion:**
- Among the minerals listed, **Fluorspar** is the only one that does not contain aluminum.

### Final Answer:
The mineral that does not contain Al is **Fluorspar**.

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