<|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
131 131 70
Ta
0.25 0.00 0.23
Nb
0.00 0.00 0.00
Bi
0.00 0.00 0.46
Bi
0.00 0.25 0.23
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
5.5 5.5 5.5
131 131 70
Ta
0.25 0.00 0.23
Nb
0.00 0.00 0.00
Bi
0.00 0.00 0.46
Bi
0.00 0.25 0.23
Identify the crystal system.