<|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:
2.9 4.4 5.7
90 90 90
Mg
0.00 0.00 0.68
Mg
0.43 0.19 0.61
Hg
0.43 0.19 0.36
Os
0.00 0.00 0.67
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
2.9 4.4 5.7
90 90 90
Mg
0.00 0.00 0.68
Mg
0.43 0.19 0.61
Hg
0.43 0.19 0.36
Os
0.00 0.00 0.67
Identify the crystal system.