Crystal System Classes: Identifying Differences
Understanding the number of crystal classes associated with each crystal system is essential for solving this problem.
Crystal System Class Counts
The number of distinct crystal classes (point groups) for the relevant crystal systems are:
| Crystal System | Number of Classes |
| Cubic | 3 |
| Tetragonal | 7 |
| Orthorhombic | 3 |
| Monoclinic | 3 |
| Hexagonal | 7 |
| Triclinic | 1 |
Comparing Class Numbers by Option
We analyze each given pair:
- Option 1: Cubic (3 classes) compared to Tetragonal (7 classes). These counts are different.
- Option 2: Monoclinic (3 classes) compared to Orthorhombic (3 classes). These counts are the same.
- Option 3: Tetragonal (7 classes) compared to Hexagonal (7 classes). These counts are the same.
- Option 4: Monoclinic (3 classes) compared to Triclinic (1 class). These counts are different.
Conclusion
The question asks to identify the pair of crystal systems that do not share the same number of classes. Both Option 1 (Cubic-Tetragonal) and Option 4 (Monoclinic-Triclinic) feature systems with differing class counts. Specifically, the Monoclinic system has 3 classes, while the Triclinic system has only 1 class. This difference makes the pair Monoclinic - Triclinic the correct choice.
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- Who was the founder of Bolshevik Communist party?
- What is the key guide to statecraft in the realist tradition?
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A. Berlin Wall is constructed
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D. The ethics of international relations is situational ethics which is very different from private morality
Choose the correct answer from the options given below:Who among the following political thinkers consider the anarchical self help system to be a compelling factor for States to maximise their relative power positions?
