Manganese (II) carbonate

Structural formula
General
Surname	Manganese (II) carbonate
other names	Manganese carbonate (ambiguous)
Molecular formula	MnCO 3
Brief description	colorless to light brown odorless solid
External identifiers / databases
CAS number 598-62-9 (anhydrous) 34156-69-9 (monohydrate) EC number 209-942-9 ECHA InfoCard 100.009.040 PubChem 11726 ChemSpider 11233 Wikidata Q414659
properties
Molar mass	114.95 g mol −1
Physical state	firmly
density	3.12 g cm −3 (monohydrate)
Melting point	Decomposes at 350 ° C
solubility	Practically insoluble in water 4 mg l −1 (20 ° C), ethanol and ammonia soluble in acids
safety instructions
GHS labeling of hazardous substances no GHS pictograms H and P phrases H: no H-phrases P: no P-phrases
Thermodynamic properties
ΔH f 0	−894.1 kJ / mol
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Manganese (II) carbonate is a chemical compound from the group of manganese compounds and carbonates .

Occurrence

Manganese (II) carbonate occurs naturally as the mineral rhodochrosite .

Extraction and presentation

Manganese (II) carbonate can be obtained by reacting dissolved manganese (II) salts with alkaline carbonates (e.g. reaction of manganese sulfate with ammonium carbonate ).

${\displaystyle \mathrm {MnSO_{4}+(NH_{4})_{2}CO_{3}\longrightarrow MnCO_{3}\downarrow +\ (NH_{4})_{2}SO_{4}} }$

properties

Manganese (II) carbonate is a colorless solid in its pure state, slightly oxidized and light brown (pink to red as a mineral) odorless solid. From a temperature of 200 ° C it decomposes, releasing manganese oxides and carbon dioxide .

use

Manganese (II) carbonate is used as a fertilizer additive, additive to improve the dielectric properties of barium titanate and for the production of ferrites and other manganese compounds. The monohydrate is also used to color (purple to violet) ceramics .

Individual evidence

1. ↑ ^{a b c d e f g} Entry on manganese (II) carbonate in the GESTIS substance database of the IFA , accessed on December 22, 2019(JavaScript required) .
2. ↑ ^{a b} National Pollutant Inventory: Manganese & compounds , accessed February 17, 2015.
3. ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Standard Thermodynamic Properties of Chemical Substances, pp. 5-20.
4. ↑ Martha Austin: On the determination of manganese as a carbonate. In: Journal of Inorganic Chemistry . 1898 , 17 (1) , pp. 272-275; doi: 10.1002 / zaac.18980170127 .
5. ↑ Page no longer available , search in web archives: Ceramic raw materials (ceramicashop)  ( Page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. (PDF; 110 kB)  
6. ↑ Manganese carbonate (Todini and Co.) ( Memento of the original from May 15, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.