Manganese

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Manganese
Chemical formula Mn
Atomic Number 25 
OTP appearance silvery solid 
Molar Mass(g/mol) 54.9 
Melting Point(°C) 1244 
Boiling Point(°C) 2061 
Density(g/cc) 7.21
NFPA 704
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Uses

Primary

Secondary

  • Component in many stainless steels

Natural Occurrence

Production

Extraction

Production of manganese is difficult. The primary source (pyrolusite, primarily manganese dioxide) is contaminated with many other materials (iron, aluminum, copper, zinc, lead, cobalt, and others) Purifying the ore is complex. Electrolytic separation of manganese is similarly complex, and is often followed with a de-hydrogenation roasting.

Purification

Testing

Storage

Disposal

See Also

References