<|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:
3.8 3.8 8.1
90 90 109
Ba
0.00 0.00 0.04
Ni
0.00 0.00 0.00
Sb
0.17 0.00 0.46
Sb
0.17 0.00 0.61
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.8 3.8 8.1
90 90 109
Ba
0.00 0.00 0.04
Ni
0.00 0.00 0.00
Sb
0.17 0.00 0.46
Sb
0.17 0.00 0.61
Identify the crystal system.