The crystallographic and physical characters resemble those of dolomite and chalybite.
These axes are called the crystallographic axes, and the planes in which they lie the axial planes.
In this system the three crystallographic axes are all at right angles, but they are of different lengths and not interchangeable.
Characterized by three crystallographic axes at right angles to each other, only two of them interchangeable.
In this system the three crystallographic axes of reference are all at right angles to each other and are equal in length.