Manganese tungstate

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Structural formula
Manganese ion Orthotungframation
General
Surname Manganese tungstate
other names
  • Manganese (II) tungstate
  • Manganese tungsten oxide
Molecular formula MnWO 4
Brief description

yellow odorless solid

External identifiers / databases
CAS number
  • 13918-22-4
  • 14177-46-9
PubChem 84239
Wikidata Q18211743
properties
Molar mass 302.79 g mol −1
Physical state

firmly

density

7.23 g cm −3

solubility

practically insoluble in water

safety instructions
GHS labeling of hazardous substances
07 - Warning

Caution

H and P phrases H: 302-332-319-335
P: 261-280-305 + 351 + 338-304 + 340-405-501
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Manganese tungstate is an inorganic chemical compound of manganese belonging to the tungstate group .

Occurrence

Manganese tungstate occurs naturally in the form of the mineral hebnerite .

Extraction and presentation

Manganese tungstate can be obtained by reacting manganese salt solutions (e.g. manganese (II) chloride or manganese (II) acetate ) with sodium tungstate .

properties

Manganese tungstate is a yellow, odorless solid that is practically insoluble in water. It has a monoclinic crystal structure with the space group P 2 / c (space group no. 13) . It is a multiferroic which is antiferromagnetic at low temperatures and antiferromagnetic at normal temperatures. Template: room group / 13

use

Manganese tungstate is used as a photocatalyst and in the electronics industry (e.g. as a moisture sensor).

Individual evidence

  1. ↑ a b c d e f g data sheet Manganese (II) tungsten oxide at AlfaAesar, accessed on June 12, 2016 ( PDF )(JavaScript required) .
  2. ↑ S. Saranya, ST Senthilkumar, K. Vijaya Sankar, R. Kalai Selvan: Synthesis of MnWO 4 nanorods and its electrical and electrochemical properties. In: Journal of Electroceramics. 28, 2012, p. 220, doi : 10.1007 / s10832-012-9714-7 .
  3. ↑ Jing Yan, Yanhua Shen, Feng Li, Taohai Li: Synthesis and Photocatalytic Properties of ZnWO 4 Nanocrystals via a Fast Microwave-Assisted Method. In: The Scientific World Journal. 2013, 2013, p. 1, doi : 10.1155 / 2013/458106 .
  4. ↑ MAP Almeida, TR Fernandes, E. Longo: Synthesis and characterization of the MnWO 4 by process hydrothermal-microwave , accessed on June 12, 2016
  5. ↑ H. DACHS, E. STOLL, H. WEITZEL: Crystal structure and magnetic order of Huebnerite, MnWO 4 . In: Journal of Crystallography - Crystalline Materials. 125, 1967, doi : 10.1524 / zkri.1967.125.16.120 .
  6. ^ O. Heyer, N. Hollmann, I. Klassen, S. Jodlauk, L. Bohatý, P. Becker, JA Mydosh, T. Lorenz, D. Khomskii: A new multiferroic material: MnWO 4 . In: Journal of Physics: Condensed Matter. 18, 2006, p. L471, doi : 10.1088 / 0953-8984 / 18/39 / L01 .
  7. ↑ Hans Dachs: On the interpretation of the magnetic structure of the prettierite, MnWO 4 . In: Solid State Communications. 7, 1969, p. 1015, doi : 10.1016 / 0038-1098 (69) 90075-1 .
  8. ↑ Wenmin Qu, Jörg-Uwe Meyer, Andrea Haeusler: Thick-film humidity sensor based on semiconducting MnWO 4 metal oxide. In: tm - technical measurement. 63, 1996, doi : 10.1524 / teme.1996.63.jg.105 .
  9. ↑ YN Jiang, BD Liu, WJ Yang, B. Yang, XY Liu, XL Zhang, MA Mohsin, X. Jiang: New strategy for the in situ synthesis of single-crystalline MnWO / TiO photocatalysts for efficient and cyclic photodegradation of organic pollutants . In: CrystEngComm. 18, 2016, p. 1832, doi : 10.1039 / C5CE02445E .