<|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:
2.7 4.2 5.1
90 101 90
Zn
0.99 0.00 0.40
Cu
0.56 0.00 0.09
Cu
0.79 0.10 0.23
Au
0.91 0.10 0.74
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
2.7 4.2 5.1
90 101 90
Zn
0.99 0.00 0.40
Cu
0.56 0.00 0.09
Cu
0.79 0.10 0.23
Au
0.91 0.10 0.74
Identify the crystal system.