16
Phosphorene 4-Layer, PBE/TZP optimized
P       0.827835285    -0.404772815     9.477899898
P      -0.827835285    -1.899038495     9.477899898
P      -0.827835285     0.404772815    -9.477899898
P       0.827835285     1.899038495    -9.477899898
P       0.827835285     0.402943006     7.346607914
P      -0.827835285     1.900868306     7.346607914
P      -0.827835285    -0.402943006    -7.346607914
P       0.827835285    -1.900868306    -7.346607914
P      -0.827835285    -0.402791366     3.873954493
P       0.827835285    -1.901019946     3.873954493
P       0.827835285     0.402791366    -3.873954493
P      -0.827835285     1.901019946    -3.873954493
P      -0.827835285     0.402721584     1.737516159
P       0.827835285     1.901089726     1.737516159
P       0.827835285    -0.402721584    -1.737516159
P      -0.827835285    -1.901089726    -1.737516159
VEC1     3.311341141    -0.000000000     0.000000000
VEC2    -0.000000000     4.607622623     0.000000000