8
Phosphorene 2-Layer, PBE/TZP optimized
P       0.827189969    -0.410348997     3.864289420
P      -0.827189969    -1.904843222     3.864289420
P      -0.827189969     0.410348997    -3.864289420
P       0.827189969     1.904843222    -3.864289420
P       0.827189969     0.408508898     1.735674409
P      -0.827189969     1.906683321     1.735674409
P      -0.827189969    -0.408508898    -1.735674409
P       0.827189969    -1.906683321    -1.735674409
VEC1     3.308759879     0.000000000     0.000000000
VEC2     0.000000000     4.630384440     0.000000000