<|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:
5.1 5.1 3.1
90 90 108
Hf
0.49 0.07 0.57
Hf
0.49 0.93 0.57
Be
0.00 0.00 0.00
Tl
0.98 0.00 0.00
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
5.1 5.1 3.1
90 90 108
Hf
0.49 0.07 0.57
Hf
0.49 0.93 0.57
Be
0.00 0.00 0.00
Tl
0.98 0.00 0.00
Identify the crystal system.