The most unsymmetrical crystal system is ________

Answer

To solve the question "The most unsymmetrical crystal system is ________", we need to understand the characteristics of different crystal systems, particularly focusing on their symmetry.

### Step-by-Step Solution:

1. **Understanding Crystal Systems**:
- There are seven crystal systems in crystallography: cubic, tetragonal, orthorhombic, hexagonal, rhombohedral, monoclinic, and triclinic.
- Each crystal system has specific symmetry properties defined by the lengths of its axes and the angles between them.

2. **Identifying Symmetry**:
- A crystal system is considered symmetrical if its axes are of equal lengths and the angles between them are equal.
- For example, in cubic systems, all three axes are equal in length, and all angles are 90 degrees.

3. **Analyzing the Triclinic System**:
- The triclinic system is characterized by having three axes of unequal lengths (a, b, c) and three angles (α, β, γ) that are all different and not equal to 90 degrees.
- This lack of equality in both lengths and angles indicates a high degree of asymmetry.

4. **Conclusion**:
- Since the triclinic system has the least symmetry among all crystal systems, it is classified as the most unsymmetrical crystal system.

### Final Answer:
The most unsymmetrical crystal system is **triclinic**.

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