<|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 3.1 9.3
90 90 90
Tc
0.00 0.00 0.55
Ru
0.53 0.53 0.10
Pb
0.53 0.53 0.79
Pb
0.00 0.00 0.91
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.1 3.1 9.3
90 90 90
Tc
0.00 0.00 0.55
Ru
0.53 0.53 0.10
Pb
0.53 0.53 0.79
Pb
0.00 0.00 0.91
Identify the crystal system.