<|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:
7.1 7.1 7.1
59 59 59
Sr
0.25 0.25 0.75
Sr
0.25 0.75 0.25
Sr
0.75 0.25 0.25
Sr
0.75 0.75 0.75
Tl
0.50 0.50 0.50
Au
0.00 0.00 0.00
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
7.1 7.1 7.1
59 59 59
Sr
0.25 0.25 0.75
Sr
0.25 0.75 0.25
Sr
0.75 0.25 0.25
Sr
0.75 0.75 0.75
Tl
0.50 0.50 0.50
Au
0.00 0.00 0.00
Identify the crystal system.