<|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:
3.4 3.4 6.6
90 90 119
Mg
0.00 0.00 0.25
Pt
0.00 0.99 0.46
Pb
0.72 1.00 0.40
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.4 3.4 6.6
90 90 119
Mg
0.00 0.00 0.25
Pt
0.00 0.99 0.46
Pb
0.72 1.00 0.40
Identify the crystal system.