<|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:
3.1 3.3 7.1
90 90 90
Mo
0.53 0.66 0.57
Pt
0.00 0.00 0.97
Pt
0.53 0.66 0.43
Br
0.00 0.00 0.76
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.1 3.3 7.1
90 90 90
Mo
0.53 0.66 0.57
Pt
0.00 0.00 0.97
Pt
0.53 0.66 0.43
Br
0.00 0.00 0.76
Identify the crystal system.