RIGBOD : Generate a Rigid Group

RIGID start of a rigid body group
atomsy coordinates of symmetry related real atoms
delete delete real atoms in fitting procedure
insert insert real atoms from bdf
cellid [a] cell constants of ideal atoms
atomor [b] orthogonal coordinates of ideal atoms
atomfr [b] fractional coordinates of ideal atoms
atname atom names for a second set of atoms

[a] Must be present to establish the conversion factor for the fractional coordinates given for the ideal atoms on atomfr lines.

[b] Indicates one or the other is optional.

RIGBOD Option Code Arg   Def
  atomlines output to pch p1   fractional coordinates  
    p2   orthogonal coordinates  
  data set number ds n   1

RIGID 1 isotropic thermal parameter U for all atoms of this group  
  2 population parameter for all atoms of this group  
  3 multiplicity for all atoms of this group  

atomsy 1 atom label  
  2-4 fractional coordinates x, y, z  

delete 1 atom label  
  2- as in 1, or use separate lines  

insert 1 atom label  
  2- as in 1, or use separate lines  

cellid 1-3 a, b, c cell lengths  
  4-6 \(\alpha \), \(\beta \), \(\gamma \) cell angles  

atomor 1 atom label  
  2-4 orthogonal coordinates x, y, z  

atomfr 1 atom label  
  2-4 fractional coordinates x, y, z  

atname 1 atom label  
  2- as in 1 or use separate atname lines