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Contents

   



(Top)
  


1 Preparation and structure  




2 See also  




3 References  













Cobalt(II) phosphate






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From Wikipedia, the free encyclopedia
  
(Redirected from Cobalt phosphate)
Cobalt(II) phosphate
Names
Other names

cobalt violet, cobalt(II) phosphate, cobalt orthophosphate, Pigment Violet 14

Identifiers

CAS Number

3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.309 Edit this at Wikidata
EC Number
  • 236-655-6

PubChem CID
UNII

CompTox Dashboard (EPA)

  • InChI=1S/3Co.2H3O4P/c;;;2*1-5(2,3)4/h;;;2*(H3,1,2,3,4)/q3*+2;;/p-6

    Key: ZBDSFTZNNQNSQM-UHFFFAOYSA-H

  • InChI=1/3Co.2H3O4P/c;;;2*1-5(2,3)4/h;;;2*(H3,1,2,3,4)/q3*+2;;/p-6

    Key: ZBDSFTZNNQNSQM-CYFPFDDLAU

  • [O-]P(=O)([O-])[O-].[O-]P(=O)([O-])[O-].[Co+2].[Co+2].[Co+2]

Properties

Chemical formula

 Co3(PO4)2
Molar mass 366.74231 g/mol
Appearance violet solid
Density 3.81 g/cm3
Melting point 1,160 °C (2,120 °F; 1,430 K)

Solubility in water

 insoluble

Solubility product (Ksp)

2.05×10−35[1]

Magnetic susceptibility (χ)

 28,110.0·10−6cm3/mol

Refractive index (nD)

 1.7

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Infobox references

Cobalt phosphate is the inorganic compound with the formula Co3(PO4)2. It is a commercial inorganic pigment known as cobalt violet.[2] Thin films of this material are water oxidation catalysts.[3]

A swatch of cobalt violet, popular among the French impressionists.

Preparation and structure

[edit]

The tetrahydrate Co3(PO4)2•4H2O precipitates as a solid upon mixing aqueous solutions of cobalt(II) and phosphate salts.[4][5] Upon heating, the tetrahydrate converts to the anhydrous material. According to X-ray crystallography, the anhydrous Co3(PO4)2 consists of discrete phosphate (PO3−
4) anions that link Co2+
 centres. The cobalt ions occupy both octahedral (six-coordinate) and pentacoordinate sites in a 1:2 ratio.[6][7]

See also

[edit]

References

[edit]
  1. ^ John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99th ed.). CRC Press. pp. 5–188. ISBN 978-1138561632.
  • ^ Hugo Müller, Wolfgang Müller, Manfred Wehner, Heike Liewald "Artists' Colors" in Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim. doi:10.1002/14356007.a03_143.pub2
  • ^ Matthew W. Kanan; Yogesh Surendranatha; Daniel G. Nocera (2009). "Cobalt–phosphate oxygen-evolving Compound". Chem. Soc. Rev. 38 (1): 109–114. doi:10.1039/B802885K. PMID 19088970.
  • ^ Donaldson, John Dallas; Beyersmann, Detmar (2005). "Cobalt and Cobalt Compounds". Ullmann's Encyclopedia of Industrial Chemistry. doi:10.1002/14356007.a07_281.pub2. ISBN 9783527303854.
  • ^ Sankar, Selvasundarasekar Sam; Rathishkumar, Arumugam; Geetha, Kathiresan; Kundu, Subrata (2020-10-15). "A Simple Route for the Synthesis of Cobalt Phosphate Nanoparticles for Electrocatalytic Water Oxidation in Alkaline Medium". Energy & Fuels. 34 (10): 12891–12899. doi:10.1021/acs.energyfuels.0c02809. ISSN 0887-0624. S2CID 224960926.
  • ^ Anderson, J. B.; Kostiner, E.; Miller, M. C.; Rea, J. R. (1975). "Crystal structure of cobalt orthophosphate Co3(PO4)2". Journal of Solid State Chemistry. 14 (4): 372–377. Bibcode:1975JSSCh..14..372A. doi:10.1016/0022-4596(75)90058-4.
  • ^ Nord, A. G.; Stefanidis, T. (1983). "Structure refinements of Co3(PO4)2. A Note on the Reliability of Powder Diffraction Studies". Acta Chemica Scandinavica A. 37: 715–721. doi:10.3891/acta.chem.scand.37a-0715.

    • Retrieved from "https://en.wikipedia.org/w/index.php?title=Cobalt(II)_phosphate&oldid=1187132037"
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     ●Cobalt(II) compounds
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