 &control
    calculation='scf',
 /
 &system
    space_group=154,
    celldm(1)=9.284,
    celldm(3)=1.100,
    nat = 2,
    ntyp= 2,
    ecutwfc = 30.0, ecutrho = 150.0
 /
 &electrons
    diagonalization='david',
    conv_thr = 1.d-8
 /
ATOMIC_SPECIES
Si   28.086   Si.pbe-rrkj.UPF
 O   15.9994   O.pbe-rrkjus.UPF
ATOMIC_POSITIONS crystal_sg
Si 3a 0.4697
 O    0.4125   0.2662    0.7855
K_POINTS automatic
2 2 2 0 0 0
