<|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:
5.4 5.4 5.4
136 136 63
Ti
0.00 0.00 0.00
Zn
0.00 0.02 0.28
Zn
0.00 0.00 0.57
Pb
0.02 0.00 0.28
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
5.4 5.4 5.4
136 136 63
Ti
0.00 0.00 0.00
Zn
0.00 0.02 0.28
Zn
0.00 0.00 0.57
Pb
0.02 0.00 0.28
Identify the crystal system.