Index

Core dictionary version 3.0.14

_refine_ls.extinction_coef

Name:
_refine_ls.extinction_coef

Aliases:
_refine_ls_extinction_coef
_refine.ls_extinction_coef

Definition:

   
     The extinction coefficient used to calculate the correction
     factor applied to the structure-factor data. The nature of the
     extinction coefficient is given in the definitions of
     _refine_ls.extinction_expression and _refine_ls.extinction_method.
     For the 'Zachariasen' method it is the r* value; for the
     'Becker-Coppens type 1 isotropic' method it is the 'g' value.
     For 'Becker-Coppens type 2 isotropic' corrections it is
     the 'rho' value. Note that the magnitude of these values is
     usually of the order of 10000.
     Ref:  Becker, P. J. & Coppens, P. (1974). Acta Cryst. A30,
       129-147, 148-153.
       Zachariasen, W. H. (1967). Acta Cryst. 23, 558-564.
       Larson, A. C. (1967). Acta Cryst. 23, 664-665.

Example:

3472(52)

Zachariasen coefficient r* = 0.347(5)e+04

Type: Real

Units: none

The permitted range is 0. → infinity

Category:
refine_ls