<|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:
4.9 4.9 3.9
90 90 94
Ga
0.00 0.00 0.00
Sn
0.68 0.19 0.93
Sn
0.68 0.81 0.93
As
0.35 0.00 0.00
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
4.9 4.9 3.9
90 90 94
Ga
0.00 0.00 0.00
Sn
0.68 0.19 0.93
Sn
0.68 0.81 0.93
As
0.35 0.00 0.00
Identify the crystal system.