The name of the structure of silicates in which three oxygen atoms of `[SiO_(4)]^(4-)` are shared is

Options

A. pyrosilicate
B. sheet silicate
C. linear-chain silicate
D. three-dimenssional silicate

Explanation

To solve the question regarding the structure of silicates in which three oxygen atoms of the `[SiO_(4)]^(4-)` tetrahedra are shared, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Silicate Structures**: Silicates are compounds that contain silicon and oxygen, and they can form various structures based on how the tetrahedra are arranged and how many oxygen atoms are shared between them.

2. **Identifying the Tetrahedral Unit**: The basic building block of silicates is the silicate tetrahedron, represented as `[SiO_(4)]^(4-)`. Each tetrahedron consists of one silicon atom surrounded by four oxygen atoms.

3. **Analyzing Different Silicate Structures**:
- **Pyrosilicates**: In this structure, two tetrahedra share one oxygen atom. The general formula is `Si2O7^(6-)`, which means only one oxygen is shared.
- **Sheet Silicates**: In sheet silicates, each tetrahedron shares three oxygen atoms with adjacent tetrahedra. The general formula is `Si2O5^(2-)`, indicating that three oxygen atoms are shared per tetrahedron.
- **Linear Chain Silicates**: In this structure, two oxygen atoms are shared between two tetrahedra. The general formula is `Si4O11^(6-)`, which shows that only two oxygen atoms are shared.
- **Three-Dimensional Silicates**: In this structure, all four oxygen atoms of the tetrahedra are shared.

4. **Conclusion**: Based on the analysis, the structure where three oxygen atoms of `[SiO_(4)]^(4-)` are shared corresponds to the sheet silicates. Therefore, the correct answer is **Sheet Silicates**.

### Final Answer:
The name of the structure of silicates in which three oxygen atoms of `[SiO_(4)]^(4-)` are shared is **Sheet Silicates**.