7 Based Crystal Sistem Crystaloghrapy

a. Isometric system (Cubic = Tesseral = Tessuler)
This system is also called a regular system, often known as a system of cube / cubic. Number 3 and the crystal axis perpendicular to one another. Each axis of equal length.

1. - Tritetrahedral
2. - Didodecahedral
3. - Hexatetrahedral
4. - Trioctahedral
5. - Hexoctahedral


b. Tetragonal system (Quadratic)
Same with the isometric system, this system has 3 axes of each crystal are perpendicular to each other. Axes a and b have the same unit of length. While the different c-axis, can be longer or shorter (usually longer).

1. - Tetragonal pyramidal
2. - Tetragonal trapezohedral
3. - Tetragonal bipyramidal
4. - Ditetragonal pyramidal
5. - Ditetragonal bipyramidal
6. - Tetragonal tetrahedral
7. - Tetragonal Scalenohedral