<|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:
3.3 3.3 8.8
90 90 91
Sn
0.00 0.00 0.69
Hg
0.28 0.00 0.72
Hg
0.00 0.00 0.21
Pt
0.28 0.00 0.30
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.3 3.3 8.8
90 90 91
Sn
0.00 0.00 0.69
Hg
0.28 0.00 0.72
Hg
0.00 0.00 0.21
Pt
0.28 0.00 0.30
Identify the crystal system.