Which of the following represents a pyrosilicate structure?

Options

A.
B.
C.
D.

Explanation

To determine which of the given options represents a pyrosilicate structure, we need to understand the characteristics of pyrosilicates.

### Step-by-Step Solution:

1. **Understanding Pyrosilicates**:
- Pyrosilicates are a type of silicate mineral that contains two silicon atoms for every seven oxygen atoms. They can be represented by the general formula \( \text{Si}_2\text{O}_7^{4-} \).
- The structure consists of two tetrahedral silicon-oxygen units that share one oxygen atom.

2. **Identifying the Structure**:
- In a pyrosilicate structure, each silicon atom is surrounded by four oxygen atoms in a tetrahedral arrangement.
- The shared oxygen between the two tetrahedra connects them, forming a chain-like structure.

3. **Analyzing the Options**:
- Look at the provided options and identify which one has the characteristic of two silicon atoms connected by shared oxygen atoms.
- The correct representation will show a structure where two tetrahedra are linked through one oxygen atom.

4. **Finalizing the Answer**:
- After analyzing the options, select the one that accurately depicts the pyrosilicate structure with the two tetrahedra sharing an oxygen atom.

### Conclusion:
The option that correctly represents a pyrosilicate structure will have two silicon atoms, each bonded to four oxygen atoms, with one oxygen atom shared between them.

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