<|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:
5.4 5.4 5.4
149 128 61
Na
0.00 0.00 0.00
Si
0.00 0.00 0.61
Os
0.00 0.34 0.95
Os
0.40 0.00 0.66
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
5.4 5.4 5.4
149 128 61
Na
0.00 0.00 0.00
Si
0.00 0.00 0.61
Os
0.00 0.34 0.95
Os
0.40 0.00 0.66
Identify the crystal system.