<|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 6.7 6.7
30 90 90
Zr
0.81 0.00 0.50
Ag
0.00 0.00 0.91
Ag
0.81 0.00 0.58
Se
0.00 0.00 0.83
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.6 6.7 6.7
30 90 90
Zr
0.81 0.00 0.50
Ag
0.00 0.00 0.91
Ag
0.81 0.00 0.58
Se
0.00 0.00 0.83
Identify the crystal system.