Origin:

Manganese, combined with other elements, is widely spread in the Earth's crust.  Manganese dioxide (MnO₂) is most commonly found.  All natural manganese is a stable isotope (manganese 55).  This isotope exists in four modifications:  the complex cubic structure (alpha phase) is stable at room temperature. 

 *ppb - parts per billion

It is obtained through Manganese mining.  (pyrolusite, psilomelane, rhodochrosite)

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