<|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:
6.8 6.8 6.8
30 30 30
Tl
0.00 0.00 0.78
B
0.00 0.00 0.81
B
0.00 0.00 0.84
Ir
0.00 0.00 0.02
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
6.8 6.8 6.8
30 30 30
Tl
0.00 0.00 0.78
B
0.00 0.00 0.81
B
0.00 0.00 0.84
Ir
0.00 0.00 0.02
Identify the crystal system.