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Manganese Dioxide

Pyrolusite powder, Manganese (greenish)

Chemistry MnO2 100.000

Significant Temperatures

• 535C: Decomposes to MnO

Links to Other Materials

• Manganese Carbonate - Unspecified
• Manganese Granular - Unspecified
• Manganese Oxide - Unspecified
• Cache

Hazards

• Manganese

Miscellaneous

• Family: Colorant
• Region: North America
• Mined At: Unspecified
• Raw Mineral: No
• Generic: Yes

Notes

This material is available as a pure material or as a ground ore (e.g. pyrolusite). Thus while generically it is pure MnO2 the actual name-brand materials may only be 75% MnO2.

Manganese is a powder colorant in ceramics. See Manganese MnO for more information.

Properties

• Body Color - Black

  When added to terra cotta bodies in amounts around 5% manganese dioxide will produce dark grey to black firing bodies.

• Glaze Color - Metallic

  Large amounts of manganese can produce metallic effects in a glaze. However, these glazes must not be used on food surfaces.

Data

• Specific Gravity: 4.9-5.0
• Specific Gravity: 4.9-5.0

Linked Articles

• Creativity and Illness by Dierdre O’Reilly

  A story of one persons struggle with manganese toxicity

• Manganèse & Composés Inorganiques Toxicologie

  Manganèse & Composés Inorganiques Toxicologie - Edouard Bastarache

• Manganese Inorganic Compounds Toxicology - Edouard Bastarache

  Manganese can be very toxic, expecially with regards to inhalation of the fumes during kiln firing. This material must be treated with care.

• My Story of Manganese and Parkinsons: Jane Watkins

  A person story about manganese poisoning.

• Potters Manganese Toxicity by Elke Blodgett

  A story of one persons struggle to identify and deal with manganese toxicity

Suppliers

• American Minerals Inc
  
• Generic
  

Authors

• Tony Hansen (Owner)

XML

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<material name="Manganese Dioxide" descrip="Pyrolusite powder, Manganese (greenish)" generic="1" rawmineral="0" searchkey="Mno2" loi="0.00">
<families>
<family name="Colorant"/>
</families>
<regions>
<region name="North America"/>
</regions>
<oxides>
<oxide symbol="MnO2" name="Manganese Dioxide" status="" percent="100.000" tolerance=""/>
</oxides>
<references>
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<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
</references>
<hazards>
<hazard name="Manganese"/>
</hazards>
<temperatures>
<temperature temperature="535C" notes="Decomposes to MnO"/>
</temperatures>
<suppliers>
<supplier name="American Minerals Inc" country="US" url="http://www.americanminerals.net" label=""/>
<supplier name="Generic" country="" url="" label=""/>
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<notes>
<note>This material is available as a pure material or as a ground ore (e.g. pyrolusite). Thus while generically it is pure MnO2 the actual name-brand materials may only be 75% MnO2.

Manganese is a powder colorant in ceramics. See Manganese MnO for more information.</note>
</notes>
<testdata>
<testitem testname="3" value="4.9-5.0"/>
<testitem testname="3" value="4.9-5.0"/>
</testdata>
</material>

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