<|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:
3.8 4.0 7.8
90 90 90
Sr
0.00 0.00 0.84
Mg
0.89 0.01 0.40
Mg
0.00 0.00 0.92
Pb
0.89 0.01 0.56
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.8 4.0 7.8
90 90 90
Sr
0.00 0.00 0.84
Mg
0.89 0.01 0.40
Mg
0.00 0.00 0.92
Pb
0.89 0.01 0.56
Identify the crystal system.