<|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 5.0
59 59 59
Ca
0.78 0.78 0.78
Mg
0.00 0.00 0.00
Si
0.55 0.55 0.55
Se
0.33 0.33 0.33
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
5.0 5.0 5.0
59 59 59
Ca
0.78 0.78 0.78
Mg
0.00 0.00 0.00
Si
0.55 0.55 0.55
Se
0.33 0.33 0.33
Identify the crystal system.