<|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:
3.1 3.1 7.4
90 90 90
Mn
0.00 0.00 0.00
Al
0.53 0.53 0.34
Al
0.53 0.53 0.03
Br
0.00 0.00 0.68
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.1 3.1 7.4
90 90 90
Mn
0.00 0.00 0.00
Al
0.53 0.53 0.34
Al
0.53 0.53 0.03
Br
0.00 0.00 0.68
Identify the crystal system.