<|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:
20.5 20.5 20.5
8 8 8
Zr
0.00 0.00 0.02
Zr
0.00 0.00 0.04
Zr
0.00 0.00 0.67
Zr
0.00 0.00 0.69
Zr
0.00 0.00 0.71
Zr
0.00 0.00 0.35
Zr
0.00 0.00 0.36
Ni
0.00 0.00 0.00
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
20.5 20.5 20.5
8 8 8
Zr
0.00 0.00 0.02
Zr
0.00 0.00 0.04
Zr
0.00 0.00 0.67
Zr
0.00 0.00 0.69
Zr
0.00 0.00 0.71
Zr
0.00 0.00 0.35
Zr
0.00 0.00 0.36
Ni
0.00 0.00 0.00
Identify the crystal system.