<|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:
6.4 6.4 6.4
51 51 51
Nb
0.00 0.00 0.63
Nb
0.00 0.00 0.09
Pb
0.00 0.00 0.08
Pb
0.00 0.00 0.64
O
0.96 0.90 0.22
O
0.17 0.95 0.22
O
0.87 0.14 0.22
O
0.13 0.86 0.50
O
0.83 0.05 0.50
O
0.04 0.10 0.50
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
6.4 6.4 6.4
51 51 51
Nb
0.00 0.00 0.63
Nb
0.00 0.00 0.09
Pb
0.00 0.00 0.08
Pb
0.00 0.00 0.64
O
0.96 0.90 0.22
O
0.17 0.95 0.22
O
0.87 0.14 0.22
O
0.13 0.86 0.50
O
0.83 0.05 0.50
O
0.04 0.10 0.50
Identify the crystal system.