Chemistry:Manganese oxalate
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(Redirected from Chemistry:Manganese(II) oxalate)
 Portion of manganese(II) oxalate dihydrate crystal (red = O, blue = Mn, white = H)[1]
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| Names | |
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| Other names
Manganese(II) oxalate, Manganese(2+) oxalate, Lindbergite
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
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PubChem CID
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| Properties | |
| C2MnO4 | |
| Molar mass | 142.956 g·mol−1 |
| Appearance | Light pink crystals |
| Density | 2.43 |
| insoluble | |
Solubility product (Ksp)
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1.7×10−7[2] |
| Hazards | |
| GHS pictograms | 
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| GHS Signal word | Warning |
| H302, H312 | |
| P264, P270, P280, P301+312, P302+352, P312, P322, P330, P363, P501 | |
| Related compounds | |
Related compounds
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Magnesium oxalate Strontium oxalate Barium oxalate Iron(II) oxalate Iron(III) oxalate Praseodymium oxalate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Manganese oxalate is an inorganic compound with the chemical formula MnC
2O
4.[3][4] Solid samples are pale pink and insoluble in water. At least two hydrates have been observed.[5] It occurs naturally as the mineral Lindbergite.[6]
Synthesis
Exchange reaction between sodium oxalate and manganese chloride:
- MnCl
2 + Na
2C
2O
4 + 2 H
2O → MnC
2O
4 · 2H2O + 2 NaCl
The dihydrate can also be prepared hydrothermally.[1]
Physical properties
Manganese oxalate forms light pink crystals. The crystalline hydrates have the composition MnC2O4•n H2O, where n = 2 and 3.[7] The dihydrate forms light pink crystals of the orthorhombic system, space group P212121, cell parameters a = 0.6262 nm, b = 1.3585 nm, c = 0.6091 nm, Z = 4, melts in its own crystallization water at 100 °C.[8][9]
It does not dissolve in water, pKsp = 6.8.
Chemical properties
Manganese oxalate is a precursor various manganese oxides, such as MnO, Mn2O3, and Mn3O4. it decomposes at 215 °C:[10]
- MnC
2O
4 → MnO + CO
2 + CO
See also
References
- ↑ 1.0 1.1 Lethbridge, Zoe A.D.; Congreve, Aileen F.; Esslemont, Emma; Slawin, Alexandra M.Z.; Lightfoot, Philip (2003). "Synthesis and structure of three manganese oxalates: MnC2O4·2H2O, [C4H8(NH2)2][Mn2(C2O4)3] and Mn2(C2O4)(OH)2". Journal of Solid State Chemistry 172 (1): 212–218. doi:10.1016/S0022-4596(03)00035-5. Bibcode: 2003JSSCh.172..212L.
- ↑ John Rumble (June 18, 2018) (in English). CRC Handbook of Chemistry and Physics (99 ed.). CRC Press. pp. 5–188. ISBN 978-1138561632.
- ↑ Lunge, Georg (1924) (in en). Lunge and Keane's Technical Methods of Chemical Analysis. 2d Ed., Edited by Charles A. Keane ...and P.C.L. Thorne. Gurney and Jackson. p. 61. https://books.google.com/books?id=-RNuAAAAIAAJ&q=Manganese+oxalate. Retrieved 5 August 2021.
- ↑ Young, Philena Anne (1928) (in en). The Volumetric Determination of Vanadium and Chromium in Special Alloy Steels: Ceric Sulfate as a Volumetric Oxidizing Agent. Mack Printing Company. p. 74. https://books.google.com/books?id=A0jPAAAAMAAJ&q=Manganese+oxalate. Retrieved 5 August 2021.
- ↑ Donkova, B.; Mehandjiev, D. (2004). "Mechanism of decomposition of manganese(II) oxalate dihydrate and manganese(II) oxalate trihydrate" (in English). Thermochimica Acta 421 (1–2): 141–149. doi:10.1016/j.tca.2004.04.001. ISSN 0040-6031. Bibcode: 2004TcAc..421..141D. https://inis.iaea.org/search/search.aspx?orig_q=RN:36074968. Retrieved 5 August 2021.
- ↑ Atencio, Daniel; Coutinho, José M.V.; Graeser, Stefan; Matioli, Paulo A.; Menezes Filho, Luiz A.D. (2004). "Lindbergite, a new Mn oxalate dihydrate from Boca Rica mine, Galiléia, Minas Gerais, Brazil, and other occurrences" (in English). American Mineralogist 89 (7): 1087–1091. doi:10.2138/am-2004-0721. ISSN 1945-3027. Bibcode: 2004AmMin..89.1087A. https://pubs.geoscienceworld.org/msa/ammin/article-abstract/89/7/1087/44298/Lindbergite-a-new-Mn-oxalate-dihydrate-from-Boca. Retrieved 1 December 2021.
- ↑ Nedyalkova, Miroslava; Antonov, Vladislav (1 January 2018). "Manganese oxalates - structure-based Insights" (in en). Open Chemistry 16 (1): 1176–1183. doi:10.1515/chem-2018-0123. ISSN 2391-5420.
- ↑ Puzan, Anna N.; Baumer, Vyacheslav N.; Lisovytskiy, Dmytro V.; Mateychenko, Pavel V. (1 April 2018). "Structure disordering and thermal decomposition of manganese oxalate dihydrate, MnC2O4·2H2O" (in en). Journal of Solid State Chemistry 260: 87–94. doi:10.1016/j.jssc.2018.01.022. ISSN 0022-4596. Bibcode: 2018JSSCh.260...87P.
- ↑ Donkova, Borjana; Avdeev, Georgi (1 August 2015). "Synthesis and decomposition mechanism of γ-MnC2O4·2H2O rods under non-isothermal and isothermal conditions" (in en). Journal of Thermal Analysis and Calorimetry 121 (2): 567–577. doi:10.1007/s10973-015-4590-4. ISSN 1588-2926.
- ↑ Ahmad, Tokeer; Ramanujachary, Kandalam V.; Lofland, Samuel E.; Ganguli, Ashok K. (24 November 2004). "Nanorods of manganese oxalate: a single source precursor to different manganese oxide nanoparticles (MnO, Mn2O3, Mn3O4)" (in en). Journal of Materials Chemistry 14 (23): 3406–3410. doi:10.1039/B409010A. ISSN 1364-5501. Bibcode: 2004JMCh...14.3406A.
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