<|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:
6.5 6.5 6.5
144 144 51
Sr
0.00 0.00 0.72
Al
0.00 0.00 0.29
Bi
0.00 0.00 0.25
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
6.5 6.5 6.5
144 144 51
Sr
0.00 0.00 0.72
Al
0.00 0.00 0.29
Bi
0.00 0.00 0.25
Identify the crystal system.