<|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
137 137 61
Li
0.00 0.00 0.00
Tc
0.00 0.00 0.37
Sb
0.00 0.00 0.37
Sb
0.00 0.00 0.75
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
5.5 5.5 5.5
137 137 61
Li
0.00 0.00 0.00
Tc
0.00 0.00 0.37
Sb
0.00 0.00 0.37
Sb
0.00 0.00 0.75
Identify the crystal system.