<|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:
3.6 3.6 7.4
90 90 104
Ca
0.00 0.00 0.70
Be
0.00 0.00 0.00
Sn
0.23 0.00 0.94
Sn
0.23 0.00 0.47
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.6 3.6 7.4
90 90 104
Ca
0.00 0.00 0.70
Be
0.00 0.00 0.00
Sn
0.23 0.00 0.94
Sn
0.23 0.00 0.47
Identify the crystal system.