Multiple choice

__________ is a subsystem of the hexagonal crystal system.

  1. Trigonal crystal system

  2. Orthorhombic crystal system

  3. Triclinic crystal system

  4. Monoclinic crystal system

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A Correct answer
Explanation

The trigonal crystal system is one of the seven crystal systems. It consists of the five point groups of the seven space groups with a rhombohedral lattice. In the classification into 6 crystal families, the trigonal crystal system is combined with the hexagonal crystal system and grouped into a larger hexagonal family.