<|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:
2.8 5.4 6.0
90 90 90
Na
0.00 0.00 0.00
La
0.00 0.00 1.00
Nb
0.41 0.72 0.58
Nb
0.41 0.72 0.42
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
2.8 5.4 6.0
90 90 90
Na
0.00 0.00 0.00
La
0.00 0.00 1.00
Nb
0.41 0.72 0.58
Nb
0.41 0.72 0.42
Identify the crystal system.