<|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:
4.0 5.6 4.5
90 90 90
Mg
0.00 0.00 0.77
Mg
0.01 0.79 0.71
Sb
0.01 0.00 0.54
Sb
0.00 0.79 0.94
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
4.0 5.6 4.5
90 90 90
Mg
0.00 0.00 0.77
Mg
0.01 0.79 0.71
Sb
0.01 0.00 0.54
Sb
0.00 0.79 0.94
Identify the crystal system.