"The crystal system represented by a ≠ b ≠ c α=γ=90° β≠90° is called_________."
Answer & explanation
Correct answer: option 3
The correct answer is 3. Monoclinic.
A monoclinic crystal system is a crystal system where the three axes are not all of equal length and the angles between the axes are not all 90 degrees. In a monoclinic crystal system, two of the axes are perpendicular to each other, but the third axis is not perpendicular to the other two axes. The angles between the axes are α=γ=90° and β≠90°.
The other crystal systems are:
- Orthorhombic: The three axes are of equal length and the angles between the axes are 90 degrees.
- Tetragonal: Two of the axes are of equal length and the angles between the axes are 90 degrees.
- Triclinic: The three axes are not of equal length and the angles between the axes are not 90 degrees.