Cobalt(II) phosphate

Cobalt(II) phosphate
Names
Other names
cobalt violet, cobalt(II) phosphate, cobalt orthophosphate, Pigment Violet 14
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.309 Edit this at Wikidata
EC Number
  • 236-655-6
UNII
  • 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
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)
insoluble
2.05×10−35[1]
28,110.0·10−6 cm3/mol
1.7
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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.
  1. ^ John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99th ed.). CRC Press. pp. 5–188. ISBN 978-1138561632.
  2. ^ 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
  3. ^ 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.