| A | B |
|---|
 | Six Types of Crystal Systems |
 | Cubic Crystal Structure Model |
| cubic crystal system | 3 axes of equal length intersect at 90 degree angles |
| orthorhombic crystal system | three axes, each of a different length, intersect at 90 degree angles |
 | Hexagonal Crystal Structure Model |
 | Monoclinic Crystal Structure Model |
 | Orthorhombic Crystal Structure Model |
 | Tetragonal Crystal Structure Model |
 | Triclinic Crystal Structure Model |
| tetragonal crystal system | three axes intersect at 90 degree angles; two of the axes are equal in length |
| triclinic crystal system | three axes, each of a different length, intersect at oblique angles |
| hexagonal crystal system | three axes of equal length intersect at 60 degree angles; the fourth axes (vertical) can be longer or shorter than the other axes. |
| monoclinic crystal system | three axes, each of a different length, intersect with two of the intersections at 90 degree angles and the third at an oblique angle. |
