8  
   1.068341e+01   0.000000e+00   0.000000e+00 
   0.000000e+00   1.068341e+01   0.000000e+00 
   0.000000e+00   0.000000e+00   1.068341e+01 
31   0.25e+00 0.25e+00 0.25e+00  0.0   1.0
31   0.75e+00 0.75e+00 0.25e+00  0.0   1.0
31   0.75e+00 0.25e+00 0.75e+00  0.0   1.0
31   0.25e+00 0.75e+00 0.75e+00  0.0   1.0
331  0.00e+00 0.00e+00 0.00e+00  0.0   1.0
331  0.50e+00 0.50e+00 0.00e+00  0.0   1.0
331  0.50e+00 0.00e+00 0.50e+00  0.0   1.0
331  0.00e+00 0.50e+00 0.50e+00  0.0   1.0
 
************************************************************
Meaning of the above lines:
==========================
line 1: natom, the number of atoms 
line 2: AL(x,1),AL(y,1),AL(z,1): (atomic unit), first lattice 
        vector of the unit cell
line 3: AL(x,2),AL(y,2),AL(z,2): (atomic unit), second lattice
        vector of the unit cell
line 4: AL(x,3),AL(y,3),AL(z,3): (atomic unit), third lattice
        vector of the unit cell
line 5 (and subsequent lines): iatype, x1, x2, x3, strain, w
       iatype: atomic number, which needs to match the atomic
          number in vq.atom file for potential generation
          and izz in pescan.input file for nonlocal
          calculation.
       x1,x2,x3: coordinates, in the range of 0 to 1. In the
          units of AL(:,1),AL(:,2),AL(:,3) respectively. 
       strain: atomistic local strain, which is needed for 
          some EPM to provide local enviroment dependent 
          potential. It is generated with the VFF program.
       w: the weight for this atom. It can be less than 1, so 
          a few atomic types occupy the same position, with the 
          sum of their w's equals 1.  It is applied to both 
          local (for vq.atom) and nonlocal (for vwr.atom)
          potentials.