### The atomic LDA calculation of Be

```***************************************************
Input file
***************************************************

System.CurrentDirectory    ./
System.Name                 Be0
<<< Calculation type >>>
eq.type                     sch
calc.type                   ALLFEM
xc.type                     LDA
<<< Atom >>>
AtomSpecies                 4
max.ocupied.N               2
total.electron              4.0000
valence.electron            2.0000

grid.xmax                  10.000    # rmax=xmax^2
grid.num                    2000
<<< SCF >>>
scf.maxIter                 200
scf.Mixing.Type             Simple
scf.Init.Mixing.Weight      0.10000
scf.Min.Mixing.Weight       0.00100
scf.Max.Mixing.Weight       0.80000
scf.criterion               1.000e-100

*****************************************************
Eigenvalues (Hartree) in all electron calculation
*****************************************************

n=  1  l=  0         -3.856410613334072
n=  2  l=  0         -0.205743784369520

*****************************************************
Energies (Hartree) in all electron calculation
*****************************************************

Etot   =      -14.447209474024532
Etot   = Ekin + EHart + Exc + Eec

Ekin   =       14.309423516473087
EHart  =        7.115257397290131
Eec    =      -33.357034274218079
Exc    =       -2.514856113569671

Exc    = Ex + Ecorr = (Ex-Ekin_x) + (Ecorr-Ekin_c) + Ekin_x + Ekin_c
Ex     =       -2.290416629361047
Ecorr  =       -0.224439484208624
Ekin_x =       -0.000000000000000
Ekin_c =        0.137785957551320

Eeigen =       -8.124308795407184

Virial theorem  2*(Ekin+Ekin_x+Ekin_c)+(EHart+Eec+Exc-Ekin_x-Ekin_c) = -0.000000000000126
Virial theorem (EHart+Eec+Exc-Ekin_x-Ekin_c)/(Ekin+Ekin_x+Ekin_c)    = -2.000000000000009
```