Manganese

 

Manganese

Chemical formula	Mn
Atomic Number	25
OTP appearance	silvery solid
Molar Mass(g/mol)	54.9
Density(g/cc)	7.21
Melting Point(°C)	1244
Boiling Point(°C)	2061
NFPA 704	0 0 0

Uses

Primary

• Essential for voltaic cell technologies

Secondary

• Component in many stainless steels

Natural Occurrence

• Elemental manganese does not occur naturally.
• manganese dioxide occurs naturally as the mineral pyrolusite

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.

References

• Manganese Processing / Extraction and Refining / Electrolytic manganese
  Last accessed 15-Aug-2013.

See Also

• Potassium permanganate