<|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:
4.3 4.3 3.0
90 90 99
Si
0.41 0.34 0.50
Si
0.41 0.66 0.50
Ir
0.00 0.00 0.00
Pt
0.81 0.00 0.00
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
4.3 4.3 3.0
90 90 99
Si
0.41 0.34 0.50
Si
0.41 0.66 0.50
Ir
0.00 0.00 0.00
Pt
0.81 0.00 0.00
Identify the crystal system.