<|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:
7.9 7.9 4.5
90 90 159
Tc
0.43 0.66 0.12
Tc
0.43 0.72 0.12
Tc
0.43 0.28 0.36
Tc
0.43 0.34 0.36
Hg
0.43 0.89 0.12
Hg
0.43 0.11 0.36
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
7.9 7.9 4.5
90 90 159
Tc
0.43 0.66 0.12
Tc
0.43 0.72 0.12
Tc
0.43 0.28 0.36
Tc
0.43 0.34 0.36
Hg
0.43 0.89 0.12
Hg
0.43 0.11 0.36
Identify the crystal system.