manganese
(III) oxide
B
N
N
O
I
O
O
N
G
O
I
G
B
B
I
I
B
G
N
I
O
G
N
N
I
G
I
B
B
G
O
O
G
B
B
Size:
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Start
B
History
Start
B
N
N
O
I
O
O
N
G
O
I
G
B
B
I
I
B
G
N
I
O
G
N
N
I
G
I
B
B
G
O
O
G
B
B
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