Final answer:
Crystal systems are characterized by their unique interaxial angles: Cubic and Tetragonal systems have 90° angles between all axes, while Monoclinic has varied angles, and Trigonal systems generally have 90° and 120° angles.
Step-by-step explanation:
The question is related to crystal systems and their interaxial angles, which is a topic in the field of chemistry, specifically mineralogy and materials science. Interaxial angles are the angles between the axes that define the crystal lattice. Different crystal systems have different sets of interaxial angles:
- Cubic crystal systems have interaxial angles of 90° between all three axes.
- Tetragonal systems also have interaxial angles of 90° between each of the axes, but differ from cubic systems in that they have two axes of equal length and one that is different.
- Monoclinic systems have interaxial angles of 90° between two of the axes, with the third axis being inclined (not 90° to the others).
- Trigonal systems, which can also be classified under the hexagonal division, typically have interaxial angles of 90° between two axes and 120° for the third.
It's important to understand these differences when studying the characteristics and symmetry of crystal structures.