Example 7

PREABS displays the crystal habit wrt the diffractometer orientation

PREABS is used to model a crystal's shape as a precursor step before the calculation of absorption corrections using ABSORB, or the refinement of path-length dependent extinction corrections using CRYLSQ, CRILSQ or LSLS. A screen image of the crystal model may be compared with the real crystal viewed through the microscope of different diffractometer types. The diffractometer viewpoint and circle angles are adjustable by clicking and dragging.