<|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:
2.9 2.9 6.9
90 90 119
Tl
0.00 0.00 0.00
Ru
0.46 0.84 0.42
Ru
0.00 0.69 0.46
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
2.9 2.9 6.9
90 90 119
Tl
0.00 0.00 0.00
Ru
0.46 0.84 0.42
Ru
0.00 0.69 0.46
Identify the crystal system.