[Wien] .struct file syntax

[Travis Sefzik]

I was wondering if anybody could explain to me how the following line  
works (second line in a struct file):

R   LATTICE,NONEQUIV.ATOMS:   2167_R-3c

What I am interested in is what the "2" that proceeds my space group  
number means.


I know that R is my lattice type,  the "167" in 2167 means that I am  
using space group number 167 (R-3c), but I don't understand the "2".


Thanks,
Travis






---
Travis Sefzik
Grandinetti Group
Chemistry Department
The Ohio State University
100 W. 18th Ave.
Columbus, OH 43210

phone: (614) 292-8064
fax: (614) 292-0559
email: tsefzik at chemistry.ohio-state.edu
home: www.chemistry.ohio-state.edu/~tsefzik