<|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:
3.7 3.7 3.5
90 90 90
Ni
0.87 0.00 0.73
Ni
0.00 0.00 0.00
Ni
0.00 0.87 0.73
Se
0.87 0.87 0.00
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.7 3.7 3.5
90 90 90
Ni
0.87 0.00 0.73
Ni
0.00 0.00 0.00
Ni
0.00 0.87 0.73
Se
0.87 0.87 0.00
Identify the crystal system.