Question

In the isometric system, the difference in the number of symmetry planes in class $4_3m(Hexahedral) class and 2/m3$ (Diploidal) is .......... (In integer)

Hint:

In crystallography, the symmetry planes correspond to mirror planes and contribute to the classification of the system. The Hexahedral class has more symmetry planes than the Diploidal class.

Answer 1

Correct Answer: 1

Step 1: Understand the symmetry planes in each class.
- In the $4_3m$ (Hexahedral) class, there are 9 symmetry planes.
- In the $2/m3$ (Diploidal) class, there are 8 symmetry planes.

Step 2: Find the difference in the number of symmetry planes.
The difference between the number of symmetry planes in these two classes is:
\[ 9 - 8 = 1 \]

Step 3: Conclusion.
Therefore, the difference in the number of symmetry planes between these two classes is \( \boxed{1} \).