<|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:
3.7 3.7 12.6
90 90 111
Na
0.00 0.00 0.00
Na
0.11 0.00 0.54
Sr
0.00 0.00 0.31
La
0.11 0.00 0.11
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.7 3.7 12.6
90 90 111
Na
0.00 0.00 0.00
Na
0.11 0.00 0.54
Sr
0.00 0.00 0.31
La
0.11 0.00 0.11
Identify the crystal system.