Manganese(II) carbonate
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215240763
2008-05-27T10:06:49Z
Aquilosion
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{{Chembox new
| Name = Manganese(II) carbonate
| ImageFile = Manganese(II)-carbonate-sample.jpg
| ImageSize =
| ImageName = Impure sample of MnCO<sub>3</sub>
| IUPACName = Manganese(II) carbonate
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| Section1 = {{Chembox Identifiers
| CASNo = 598-62-9
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| Section2 = {{Chembox Properties
| Formula = MnCO<sub>3</sub>
| MolarMass = 114.94 g/mol
| Appearance = brown
| Density = 3.125 g/cm<sup>3</sup>
| Solubility = insol
| MeltingPt = decomp. 200 °C
| BoilingPt =
}}
| Section3 = {{Chembox Structure
| Coordination =
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| Dipole =
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| Section7 = {{Chembox Hazards
| ExternalMSDS =
| MainHazards =
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| Section8 = {{Chembox Related
| OtherAnions =
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'''Manganese carbonate''' is a [[chemical compound|compound]] with the [[chemical formula]] [[Manganese|Mn]][[Carbon|C]][[Oxygen|O]]<sub>3</sub>. Manganese carbonate occurs naturally as the [[mineral]] [[rhodochrosite]]. Approximately 20M kg (20,000 metric tons) were produced in 2005.<ref name=Reidies>Arno H. Reidies "Manganese Compounds" Ullmann's Encyclopedia of Chemical Technology 2007; John Wiley</ref>
==Production and uses==
Treatment of aqueous solutions of manganese(II) salts with alkali metal carbonates leads to precipitation of this faintly pink solid. The carbonate is insoluble in water but, like most carbonates, hydrolyses upon treatment with acids to give water-soluble salts.
Manganese carbonate decomposes with release of [[carbon dioxide]] at 200 °C to give manganese(II) oxide:
:MnCO<sub>3</sub> → MnO + CO<sub>2</sub>
This method is sometimes employed in the production of [[manganese dioxide]] for dry-cell batteries and for [[ferrite]]s.<ref name=Reidies/>
Manganese carbonate is widely used as an additive to plant fertilizers to cure manganese deficient crops. It is also used in health foods, in ceramics as a [[ceramic glaze|glaze]] [[ceramic colorants|colorant]] and flux, and in [[Decorative concrete|concrete stains]].<ref>[http://www.stainedfloor.com/Manganese_Recipes.html "How To Stain Concrete with Manganese"]</ref>
== Toxicity ==
Manganese is essential for aerobic life and its compounds are not highly toxic. Manganese poisoning, also known as [[manganism]], may be caused by long-term exposure to manganese dust or fumes.
==See also==
*[[Manganese deficiency (medicine)]]
==References==
<references/>
== External links ==
*<!-- this link is to MgCO3, not MnCO3 [http://www.ilo.org/public/english/protection/safework/cis/products/icsc/dtasht/_icsc09/icsc0969.htm International Chemical Safety Card 0969] -->
[[Category:Carbonates]]
[[Category:Manganese compounds]]
[[pl:Węglan manganu(II)]]