<|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:
3.3 3.4 6.6
90 91 90
Y
0.00 0.00 0.00
Sb
0.91 0.00 0.28
Ru
0.63 0.68 0.80
Ru
0.50 0.68 0.77
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.3 3.4 6.6
90 91 90
Y
0.00 0.00 0.00
Sb
0.91 0.00 0.28
Ru
0.63 0.68 0.80
Ru
0.50 0.68 0.77
Identify the crystal system.