<|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:
5.0 5.0 3.7
90 90 90
Ca
0.00 0.51 0.83
Ca
0.51 0.00 0.83
Al
0.00 0.00 0.00
Ni
0.51 0.51 0.00
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
5.0 5.0 3.7
90 90 90
Ca
0.00 0.51 0.83
Ca
0.51 0.00 0.83
Al
0.00 0.00 0.00
Ni
0.51 0.51 0.00
Identify the crystal system.