Corundum is `"…………"` mineral of aluminium

Options

A. silicate
B. oxide
C. double salt
D. sulphate

Explanation

**Step-by-Step Solution:**

1. **Identify Corundum**: Corundum is a mineral that is primarily composed of aluminum oxide (Al₂O₃). It is known for its hardness and is often used as an abrasive.

2. **Chemical Formula**: The chemical formula for corundum is Al₂O₃, which indicates that it is an oxide mineral of aluminum.

3. **Crystalline Structure**: Corundum has a crystalline structure, which means that its atoms are arranged in a highly ordered and repeating pattern.

4. **Trace Elements**: In addition to aluminum, corundum may contain trace amounts of other elements such as scandium, titanium, and vanadium, which can affect its color and properties.

5. **Color Variations**: Corundum can occur in various colors depending on the presence of impurities. For example, when it is red, it is known as ruby, and when it is blue, it is known as sapphire.

6. **Conclusion**: Therefore, the answer to the question "Corundum is __________ mineral of aluminum" is "oxide".

**Final Answer**: Corundum is an oxide mineral of aluminum.

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