Which is not a mineral of aluminium?

Options

A. Anhydrite
B. Bauxite
C. Corundum
D. Diaspore

Answer

To determine which of the given options is not a mineral of aluminum, we will analyze each option based on its chemical composition and classification.

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are:
- Anhydride
- Bauxite
- Corundum
- Diaspore

2. **Analyze Each Option**:
- **Anhydride**: The chemical formula is CaSO4 (anhydrous calcium sulfate). This mineral is primarily associated with calcium, not aluminum. Therefore, it is not a mineral of aluminum.

- **Bauxite**: The chemical formula is Al2O3 · 2H2O (hydrated aluminum oxide). Bauxite is the primary ore of aluminum and is indeed a mineral of aluminum.

- **Corundum**: The chemical formula is Al2O3 (aluminum oxide). Corundum is a crystalline form of aluminum oxide and is also a mineral of aluminum.

- **Diaspore**: The chemical formula is Al2O3 · H2O (hydrated aluminum oxide). Diaspore is another mineral that contains aluminum.

3. **Conclusion**: Among the options, Anhydride is the only one that is not a mineral of aluminum. The correct answer is Anhydride.

### Final Answer:
The mineral that is not associated with aluminum is **Anhydride**.