| Revision as of 22:44, 7 December 2011 editCheMoBot (talk | contribs)Bots141,565 edits Updating {{chembox}} (no changed fields - added verified revid - updated 'DrugBank_Ref', 'ChEMBL_Ref', 'ChEBI_Ref', 'KEGG_Ref') per Chem/Drugbox validation (report errors or [[user talk:Che...← Previous edit | Revision as of 15:40, 18 March 2012 edit undoRycecube57 (talk | contribs)2,114 edits +properties per PubChemNext edit → | ||
| Line 30: | Line 30: | ||
| | Solubility = negligible | | Solubility = negligible | ||
| | SolubilityProduct = 2.24 x 10<sup>-11</sup> | | SolubilityProduct = 2.24 x 10<sup>-11</sup> | ||
| | SolubleOther = soluble in dilute acid, ] <br> insoluble in ], ] | |||
| | MeltingPt = decomp. 200 °C | | MeltingPt = decomp. > 200 °C | ||
| | BoilingPt = | | BoilingPt = | ||
| | RefractIndex = 1.597 (589nm, 20°C) | | RefractIndex = 1.597 (589nm, 20°C) | ||
| Line 60: | Line 61: | ||
| 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 ] ] and flux, and in ].<ref></ref> | 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 ] ] and flux, and in ].<ref></ref> | ||
| It is used in medicine as a ]. | |||
| == Toxicity == | == Toxicity == | ||
Revision as of 15:40, 18 March 2012
_Carbonate.jpg) | |
| Names | |
|---|---|
| IUPAC name Manganese(II) carbonate | |
| Identifiers | |
| CAS Number | |
| 3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.009.040 
|
| PubChem CID | |
| UNII | |
| CompTox Dashboard (EPA) | |
InChI
| |
SMILES
| |
| Properties | |
| Chemical formula | MnCO3 |
| Molar mass | 114.9469 g/mol |
| Appearance | White to faint pink solid |
| Density | 3.70 g/cm |
| Melting point | decomp. > 200 °C |
| Solubility in water | negligible |
| Solubility product (Ksp) | 2.24 x 10 |
| Solubility | soluble in dilute acid, CO2 insoluble in alcohol, ammonia |
| Refractive index (nD) | 1.597 (589nm, 20°C) |
| Structure | |
| Crystal structure | hexagonal-rhombohedral |
| Hazards | |
| Flash point | Non-flammable |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa).
 Y verify (what is ?)
Infobox references
| |
Manganese carbonate is a compound with the chemical formula MnCO3. Manganese carbonate occurs naturally as the mineral rhodochrosite. Approximately 20,000 metric tonnes were produced in 2005.
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:
- MnCO3 → MnO + CO2
This method is sometimes employed in the production of manganese dioxide for dry-cell batteries and for ferrites.
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 glaze colorant and flux, and in concrete stains.
It is used in medicine as a hematinic.
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
References
- ^ Arno H. Reidies "Manganese Compounds" Ullmann's Encyclopedia of Chemical Technology 2007; John Wiley
- "How To Stain Concrete with Manganese"
| Manganese compounds | |
|---|---|
| Manganese(−I) | |
| Manganese(0) | |
| Manganese(I) | |
| Manganese(II) | |
| Manganese(II,III) | |
| Manganese(II,IV) | |
| Manganese(III) | |
| Manganese(IV) | |
| Manganese(V) | |
| Manganese(VI) | |
| Manganese(VII) | |