<|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:
3.6 5.5 6.5
90 90 90
Na
0.00 0.00 0.56
La
0.81 0.73 0.57
Sb
0.81 0.73 0.81
Sb
0.00 0.00 0.34
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.6 5.5 6.5
90 90 90
Na
0.00 0.00 0.56
La
0.81 0.73 0.57
Sb
0.81 0.73 0.81
Sb
0.00 0.00 0.34
Identify the crystal system.