<|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:
3.5 3.5 7.7
90 90 91
Sr
0.46 0.00 0.12
Cd
0.00 0.00 0.36
Cd
0.46 0.00 0.47
Cu
0.00 0.00 0.25
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.5 3.5 7.7
90 90 91
Sr
0.46 0.00 0.12
Cd
0.00 0.00 0.36
Cd
0.46 0.00 0.47
Cu
0.00 0.00 0.25
Identify the crystal system.