<|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:
7.4 7.4 7.4
157 157 31
Na
0.00 0.00 0.17
Ta
0.00 0.00 0.42
Pd
0.00 0.00 0.67
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
7.4 7.4 7.4
157 157 31
Na
0.00 0.00 0.17
Ta
0.00 0.00 0.42
Pd
0.00 0.00 0.67
Identify the crystal system.