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[kxyhu@yahoo.com.cn]

Hi everyone,

I am a new user of abinit. My material is  SrBi2Ta2O9. In the input file the 
"spgroup" is 36 but in the output files the space group is 38. Moreover the 
Angles of the  primitive cell are 90, 90, 24.89462,but in the output file the 
Angles are 9.00000000E+01  9.00000000E+01  8.99822201E+01 degrees. Could you 
please help me. my input files is below:

#Definition of the k-point grids
kptopt 1         
kptrlatt   6 0 0
           0 6 0
           0 0 6

#Definition of the unit cell
acell 
10.43926  10.44250  47.3089
brvltt -1
angdeg   90 90  90
spgaxor  6
#Definition of the atom types
ntype   4
znucl   38  83  73  8
spgroup 36
#Definition of the atoms
natom  28
natrd   8

type  1  2  3 4 4 4 4 4 

xred
    0.0     0.2567     0.0
    0.4634  0.7764  0.19996
    0.5104  0.7480  0.41482
    0.5248  0.2892  0.0
    0.5219  0.699   0.34187
    0.7381  0.9923  0.25076
    0.7554  0.9867  0.06964
    0.7909  0.9807  0.58359

#Definition of the planewave basis set
ecut 15

#Definition of the SCF procedure
nstep  30      
toldfe  1.0d-8
           
diemac 5.0 
            
My output file includes the following information:  

  Symmetries : space group Am m 2 (# 38); Bravais oC (1-face-center ortho.)
================================================================================
 Values of the parameters that define the memory need of the present run
   intxc =         0  ionmov =         0    iscf =         5     ixc =        
 1
  lmnmax =         7   lnmax =         7   mband =        96  mffmem =        
 1
   mgfft =       180   mkmem =        36 mpssoang=         3     mpw =      
7194
  mqgrid =      1201   natom =        28    nfft =    131220    nkpt =        
36
  nloalg =         4  nspden =         1 nspinor =         1  nsppol =        
 1
    nsym =         4  n1xccc =         0   ntype =         4  occopt =        
 1
================================================================================

 Angles (23,13,12)=  9.00000000E+01  9.00000000E+01  8.99822201E+01 degrees

 Real(R)+Recip(G) space primitive vectors, cartesian coordinates 
(Bohr,Bohr^-1):
 R(1)=  5.2196300  5.2212500  0.0000000  G(1)=  0.0957922  0.0957625  
0.0000000
 R(2)= -5.2196300  5.2212500  0.0000000  G(2)= -0.0957922  0.0957625  
0.0000000
 R(3)=  0.0000000  0.0000000 47.3089000  G(3)=  0.0000000  0.0000000  
0.0211377
 Unit cell volume ucvol=  2.5786183E+03 bohr^3
 Angles (23,13,12)=  9.00000000E+01  9.00000000E+01  8.99822201E+01 degrees