<|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:
7.5 7.5 7.5
59 59 59
Na
0.00 0.00 0.00
Sr
0.97 0.97 0.60
Sr
0.97 0.60 0.97
Sr
0.60 0.97 0.97
Sr
0.60 0.60 0.60
Pb
0.64 0.64 0.64
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
7.5 7.5 7.5
59 59 59
Na
0.00 0.00 0.00
Sr
0.97 0.97 0.60
Sr
0.97 0.60 0.97
Sr
0.60 0.97 0.97
Sr
0.60 0.60 0.60
Pb
0.64 0.64 0.64
Identify the crystal system.