<|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:
4.2 4.2 3.7
90 90 90
Ca
0.00 0.00 0.00
Ga
0.11 0.11 0.00
Ir
0.11 0.00 0.87
Ir
0.00 0.11 0.87
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
4.2 4.2 3.7
90 90 90
Ca
0.00 0.00 0.00
Ga
0.11 0.11 0.00
Ir
0.11 0.00 0.87
Ir
0.00 0.11 0.87
Identify the crystal system.