Manganese oxalate

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Manganese oxalate
96426-ICSD.png
Portion of manganese(II) oxalate dihydrate crystal (red = O, blue = Mn, white = H) [1]
Names
Other names
Manganese(II) oxalate, Manganese(2+) oxalate, Lindbergite
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.010.335 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 211-367-3
PubChem CID
UNII
  • InChI=1S/C2H2O4.Mn/c3-1(4)2(5)6;/h(H,3,4)(H,5,6);/q;+2/p-2
    Key: RGVLTEMOWXGQOS-UHFFFAOYSA-L
  • C(=O)(C(=O)[O-])[O-].[Mn+2]
Properties
C2MnO4
Molar mass 142.956 g·mol−1
AppearanceLight pink crystals
Density 2.43
insoluble
1.7×10−7 [2]
Hazards
GHS labelling:
GHS-pictogram-exclam.svg
Warning
H302, H312
P264, P270, P280, P301+P312, P302+P352, P312, P322, P330, P363, P501
Related compounds
Related compounds
 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).

Manganese oxalate is an inorganic compound with the chemical formula MnC2O4. [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]

Contents

Synthesis

Exchange reaction between sodium oxalate and manganese chloride:

MnCl2 + Na2C2O4 + 2 H2O → MnC2O4·2H2O + 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, Mn
2O
3, and Mn
3O
4. it decomposes at 215 °C: [10]

MnC2O4 → MnO + CO2 + CO

See also

References

  1. 1 2 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: 212–218. doi:10.1016/S0022-4596(03)00035-5.
  2. ↑ John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99 ed.). CRC Press. pp. 5–188. ISBN   978-1138561632.
  3. ↑ Lunge, Georg (1924). 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. Retrieved 5 August 2021.
  4. ↑ Young, Philena Anne (1928). The Volumetric Determination of Vanadium and Chromium in Special Alloy Steels: Ceric Sulfate as a Volumetric Oxidizing Agent. Mack Printing Company. p. 74. Retrieved 5 August 2021.
  5. ↑ Donkova, B.; Mehandjiev, D. (2004). "Mechanism of decomposition of manganese(II) oxalate dihydrate and manganese(II) oxalate trihydrate" . Thermochimica Acta. 421 (1–2): 141–149. Bibcode:2004TcAc..421..141D. doi:10.1016/j.tca.2004.04.001. ISSN   0040-6031 . Retrieved 5 August 2021.
  6. ↑ 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" . American Mineralogist. 89 (7): 1087–1091. Bibcode:2004AmMin..89.1087A. doi:10.2138/am-2004-0721. ISSN   1945-3027. S2CID   100604132 . Retrieved 1 December 2021.
  7. ↑ Nedyalkova, Miroslava; Antonov, Vladislav (1 January 2018). "Manganese oxalates - structure-based Insights". Open Chemistry. 16 (1): 1176–1183. doi: 10.1515/chem-2018-0123 . ISSN   2391-5420. S2CID   104343447.
  8. ↑ 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". Journal of Solid State Chemistry . 260: 87–94. Bibcode:2018JSSCh.260...87P. doi:10.1016/j.jssc.2018.01.022. ISSN   0022-4596.
  9. ↑ Donkova, Borjana; Avdeev, Georgi (1 August 2015). "Synthesis and decomposition mechanism of γ-MnC2O4·2H2O rods under non-isothermal and isothermal conditions". Journal of Thermal Analysis and Calorimetry . 121 (2): 567–577. doi:10.1007/s10973-015-4590-4. ISSN   1588-2926. S2CID   97032400.
  10. ↑ 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)". Journal of Materials Chemistry . 14 (23): 3406–3410. doi:10.1039/B409010A. ISSN   1364-5501.
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