In seven pssible crystal system hoe many crystal system have more than one Bravais lattic ?

Options

A. Hexagonal
B. Triclinic
C. Rhombohedral
D. Monoclinic

Explanation

To solve the question regarding how many crystal systems have more than one Bravais lattice among the seven possible crystal systems, we can follow these steps:

### Step 1: Understand the Concept of Bravais Lattices
Bravais lattices are distinct arrangements of points in space, and there are a total of 14 Bravais lattices classified under seven crystal systems.

### Step 2: Identify the Seven Crystal Systems
The seven crystal systems are:
1. Triclinic
2. Monoclinic
3. Orthorhombic
4. Tetragonal
5. Rhombohedral
6. Hexagonal
7. Cubic

### Step 3: Determine the Number of Bravais Lattices in Each Crystal System
Now, we need to identify how many Bravais lattices are associated with each of these crystal systems:
- **Triclinic**: 1 Bravais lattice
- **Monoclinic**: 2 Bravais lattices
- **Orthorhombic**: 4 Bravais lattices
- **Tetragonal**: 2 Bravais lattices
- **Rhombohedral**: 1 Bravais lattice
- **Hexagonal**: 1 Bravais lattice
- **Cubic**: 3 Bravais lattices

### Step 4: Count the Crystal Systems with More Than One Bravais Lattice
From the above information, we can see:
- Monoclinic: 2 Bravais lattices
- Orthorhombic: 4 Bravais lattices
- Tetragonal: 2 Bravais lattices
- Cubic: 3 Bravais lattices

Thus, the crystal systems that have more than one Bravais lattice are:
1. Monoclinic
2. Orthorhombic
3. Tetragonal
4. Cubic

### Step 5: Conclusion
There are a total of **4 crystal systems** that have more than one Bravais lattice.

### Final Answer
**4 crystal systems have more than one Bravais lattice.**

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