<|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:
7.9 7.9 7.9
154 154 36
Na
0.00 0.00 0.83
Y
0.00 0.00 0.28
Pb
0.00 0.00 0.97
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
7.9 7.9 7.9
154 154 36
Na
0.00 0.00 0.83
Y
0.00 0.00 0.28
Pb
0.00 0.00 0.97
Identify the crystal system.