<|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:
6.5 6.5 6.5
59 59 59
Na
0.00 0.00 0.00
Tl
0.44 0.44 0.73
Tl
0.44 0.73 0.44
Tl
0.73 0.44 0.44
Tl
0.73 0.73 0.73
Sn
0.29 0.29 0.29
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
6.5 6.5 6.5
59 59 59
Na
0.00 0.00 0.00
Tl
0.44 0.44 0.73
Tl
0.44 0.73 0.44
Tl
0.73 0.44 0.44
Tl
0.73 0.73 0.73
Sn
0.29 0.29 0.29
Identify the crystal system.