Manganese violet

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Manganese violet
Manganese violet.jpg
Names
Other names
ammonium manganese(III) pyrophosphate
Identifiers
  • 10101-66-3
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.030.221 Edit this at Wikidata
EC Number
  • 233-257-4
UNII
  • InChI=1S/Mn.H3N.H4O7P2/c;;1-8(2,3)7-9(4,5)6/h;1H3;(H2,1,2,3)(H2,4,5,6)/q+3;;/p-3
    Key: UHHXUPJJDHEMGX-UHFFFAOYSA-K
  • [N+H4].[Mn+3].O=P([O-])([O-])OP([O-])([O-])=O
Properties
NH4MnP2O7
Molar mass 246.885
Appearance violet solid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Manganese violet is the common name for ammonium manganese(III) pyrophosphate, an inorganic compound composed of ammonium (NH+
4), manganese in the +3 oxidation state, and the pyrophosphate anion (P
2O4−
7). It is prepared by heating a mixture of manganese(III) oxide (Mn
2O
3), diammonium phosphate, and phosphoric acid. This material is a popular inorganic pigment.[1]

Chemical structure[]

Two polymorphs are known, referred to as the α- and β-forms, but in each case the structures are similar. The Mn(III) centres occupy distorted octahedral sites, being surrounded by six oxygens provided by the pyrophosphate ligands.[2]

Spectra[]

IR-spectra, reflectance, and fluorescence spectra can be found at ColourLex.[3]

Use[]

Manganese violet is used in eye liner pencils, eye shadow, lipstick, nail enamel, and oil paint.[4]

See also[]

References[]

  1. ^ 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
  2. ^ Yasmin Begum, Adrian J. Wright "Relating highly distorted Jahn–Teller MnO6 to colouration in manganese violet pigments" J. Mater. Chem., 2012, vol. 22, pp. 21110–21116. doi:10.1039/c2jm33731b
  3. ^ Manganese violet, at ColourLex
  4. ^ "Household Products Database - Health and Safety Information on Household Products". hpd.nlm.nih.gov.
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