<|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:
7.0 7.0 7.0
142 142 54
Sr
0.00 0.00 0.25
Tl
0.00 0.29 0.13
Br
0.00 0.00 0.00
Br
0.29 0.00 0.13
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
7.0 7.0 7.0
142 142 54
Sr
0.00 0.00 0.25
Tl
0.00 0.29 0.13
Br
0.00 0.00 0.00
Br
0.29 0.00 0.13
Identify the crystal system.