<|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:
4.0 4.2 4.9
90 90 90
Ti
0.00 0.00 0.00
Ir
0.00 0.09 0.43
Pb
0.02 0.09 0.00
Pb
0.02 0.00 0.43
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
4.0 4.2 4.9
90 90 90
Ti
0.00 0.00 0.00
Ir
0.00 0.09 0.43
Pb
0.02 0.09 0.00
Pb
0.02 0.00 0.43
Identify the crystal system.