<|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:
10.3 10.3 10.3
18 18 18
Na
0.00 0.00 0.00
Ti
0.00 0.00 0.21
Tl
0.00 0.00 0.96
Tl
0.00 0.00 0.46
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
10.3 10.3 10.3
18 18 18
Na
0.00 0.00 0.00
Ti
0.00 0.00 0.21
Tl
0.00 0.00 0.96
Tl
0.00 0.00 0.46
Identify the crystal system.