4

Zr      0.145269348442302      0.211856776013006      0.077977472963874
Zr      1.765995133176602      1.583291802713012      0.059577984059971
Nb      1.661926067426150     -0.004907649411625      1.530993332900192
Nb      0.190458003375739      1.529088719263672      1.425887622533798