<|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:
5.6 5.6 5.6
90 90 90
Pb
0.80 0.80 0.80
Se
0.80 0.00 0.80
Se
0.80 0.80 0.00
Se
0.00 0.80 0.80
F
0.00 0.00 0.00
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
5.6 5.6 5.6
90 90 90
Pb
0.80 0.80 0.80
Se
0.80 0.00 0.80
Se
0.80 0.80 0.00
Se
0.00 0.80 0.80
F
0.00 0.00 0.00
Identify the crystal system.