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[郑勇平 <zyp@fjnu.edu.cn>]

Dear all:
I want build Ge3N4 struture, It has a symmetry P63/M(#176), but the 
Abinit fail to recognise it, it recognises it to be P21/M #11). when I 
use spgroup 176, brvltt -1 ,chkprim 1 .the ouput get a  Warning: like 
"symatm : WARNING -  Trouble finding symmetrically equivalent atoms  
Applying inv of symm number 12 to atom number   7  of typat  1   gives 
tratom=  3.3333E-01 -3.3333E-01  2.5000E-01." etc. how to  set the right 
structure, anybody give me a hand .


acell 15.174501  15.174501 5.820356
angdeg 90 90 120
#Definition of the atom types
#      14 kind of atoms
#       ['N', 'Ge']
ntypat 2
znucl  7 32
#Definition of tha atoms
natom  14
typat  1 1 1 1 1 1 1 1 2 2 2 2 2 2
xred
0.331033   0.030472   0.250000
-0.030472   0.300560   0.250000
-0.300560  -0.331033   0.250000
-0.331033  -0.030472   0.750000
0.030472  -0.300560   0.750000
0.300560   0.331033   0.750000
0.333333   0.666667   0.250000
-0.333333  -0.666667   0.750000
0.174648   0.768334   0.250000
-0.768334  -0.593686   0.250000
0.593686  -0.174648   0.250000
-0.174648  -0.768334   0.750000
0.768334   0.593686   0.750000
-0.593686   0.174648   0.750000