<|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 4.7 6.9
90 90 90
Al
0.00 0.00 0.00
Sn
0.00 0.00 0.44
Pb
0.71 0.35 0.65
Pb
0.71 0.35 0.24
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.4 4.7 6.9
90 90 90
Al
0.00 0.00 0.00
Sn
0.00 0.00 0.44
Pb
0.71 0.35 0.65
Pb
0.71 0.35 0.24
Identify the crystal system.