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Modulated Structures CIF Dictionary version 1.0

_geom_torsion_

Names

'_geom_torsion_max' '_geom_torsion_min' '_geom_torsion_av'

Category: geom_torsion

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

Must appear in a looped list containing '_geom_torsion_atom_site_label_'

Units: deg ( Degrees)

Definition

    	
   Maximum, minimum and average torsion angles in degrees bounded
   by the four atom sites identified by the
   _geom_torsion_atom_site_label_ codes. These must match labels
   specified as _atom_site_label in the atom list. The torsion
   angle definition should be that of Klyne, W. & Prelog, V. (1960).
   Endeavour, 16, 521-528.

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