[IUCr Home Page] [CIF Home Page]

Core CIF Dictionary version 2.3

_atom_site_occupancy

Name

'_atom_site_occupancy'

Category: atom_site

Data type: numb (with optional s.u. in parentheses)

Must appear in a looped list containing '_atom_site_label'

Enumeration range: 0.0 -> 1.0
Enumeration default: 1.0

Definition

    	
   The fraction of the atom type present at this site.
   The sum of the occupancies of all the atom types at this site
   may not significantly exceed 1.0 unless it is a dummy site. The
   value must lie in the 99.97% Gaussian confidence interval
   -3u =_enumeration_range of 0.0:1.0 is thus
   correctly interpreted as meaning (0.0 - 3u) =

Copyright © 2003 International Union of Crystallography

IUCr Webmaster