<|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:
3.9 4.1 5.5
90 90 90
Tl
0.96 0.00 0.75
Tl
0.96 0.06 0.00
Cu
0.00 0.06 0.75
P
0.00 0.00 0.00
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.9 4.1 5.5
90 90 90
Tl
0.96 0.00 0.75
Tl
0.96 0.06 0.00
Cu
0.00 0.06 0.75
P
0.00 0.00 0.00
Identify the crystal system.