<|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:
5.5 5.5 5.5
90 90 90
Cr
0.00 0.00 0.00
Sn
0.73 0.00 0.73
Sn
0.73 0.73 0.00
Sn
0.00 0.73 0.73
Br
0.73 0.73 0.73
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
5.5 5.5 5.5
90 90 90
Cr
0.00 0.00 0.00
Sn
0.73 0.00 0.73
Sn
0.73 0.73 0.00
Sn
0.00 0.73 0.73
Br
0.73 0.73 0.73
Identify the crystal system.