<|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:
9.7 9.7 9.7
21 21 21
Ca
0.00 0.00 0.34
Ca
0.00 0.00 0.01
Be
0.00 0.00 0.00
Sn
0.00 0.00 0.18
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
9.7 9.7 9.7
21 21 21
Ca
0.00 0.00 0.34
Ca
0.00 0.00 0.01
Be
0.00 0.00 0.00
Sn
0.00 0.00 0.18
Identify the crystal system.