<|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:
12.0 12.0 12.0
17 17 17
Ca
0.00 0.00 0.54
Ca
0.00 0.00 0.00
Ca
0.00 0.00 0.94
Ti
0.00 0.00 0.74
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
12.0 12.0 12.0
17 17 17
Ca
0.00 0.00 0.54
Ca
0.00 0.00 0.00
Ca
0.00 0.00 0.94
Ti
0.00 0.00 0.74
Identify the crystal system.