<|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:
6.5 6.5 6.5
137 137 61
Ba
0.36 0.00 0.81
Ba
0.00 0.00 0.62
Zr
0.00 0.00 0.00
Pt
0.00 0.36 0.81
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
6.5 6.5 6.5
137 137 61
Ba
0.36 0.00 0.81
Ba
0.00 0.00 0.62
Zr
0.00 0.00 0.00
Pt
0.00 0.36 0.81
Identify the crystal system.