<|im_start|>system
Please reason step by step, and put your final answer within \boxed{}.<|im_end|>
<|im_start|>user
Given the following crystal representation:
5.5 5.5 5.5
59 59 59
Nb
0.00 0.59 0.50
Nb
0.38 0.20 0.50
Nb
0.62 0.20 0.50
Nb
0.00 0.00 0.00
Nb
0.00 0.00 0.75
Ni
0.38 0.80 0.25
Ni
0.62 0.80 0.25
Ni
0.00 0.41 0.25
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
5.5 5.5 5.5
59 59 59
Nb
0.00 0.59 0.50
Nb
0.38 0.20 0.50
Nb
0.62 0.20 0.50
Nb
0.00 0.00 0.00
Nb
0.00 0.00 0.75
Ni
0.38 0.80 0.25
Ni
0.62 0.80 0.25
Ni
0.00 0.41 0.25
Identify the crystal system.