TECHNIQUES FOR ABSORPTION CORRECTION

PLATON implements a variety of established techniques for correction for absorption.

1. Numerical Methods (Supposedly close to exact and based on FACE indexing)
   1. ABST: Analytical following the Alcock version of "de Meulenaer & Tompa"

   2. ABSG: Gaussian Integration (Modified from Coppens)

   3. ABSS: Spherical Absorption Correction

2. Semi-empirical methods (based on redundant/additional experimental data)
   1. ABSP: Psi-Scan data based correction (North et al.)

   2. MULABS: Based on multi-scanned reflection data (Blessing)

3. Empirical Methods
   1. DELABS: Modified and extended implementation of the DIFABS algoritm (Walker & Stuart)

Additional features provided are:

• ABSX: Comparison of calculated (i.e. Face-Indexed Alcock) and experimental psi-scans.

• XTAL HABIT for the display of a face indexed crystal.

Absorption correction related instructions

Absorption Correction References

21-09-98