Manganese diselenide

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Manganese(II) diselenide
Identifiers
3D model (
JSmol
)
ECHA InfoCard
 100.032.323 Edit this at Wikidata
EC Number
  • 235-569-6
UNII
  • InChI=1S/Mn.2Se
    Key: KDAKOPXAEMJUSU-UHFFFAOYSA-N
  • [Mn](=[Se])=[Se]
Properties
MnSe2
Molar mass 212.880 g·mol−1
Appearance grey, odorless powder
Density 5.55 g/cm3
insoluble
Hazards
GHS labelling:
GHS06: ToxicGHS08: Health hazardGHS09: Environmental hazard
Danger
H301, H331, H373, H410
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Manganese(II) diselenide is the

iron pyrite (FeS2). Analogous to the description of iron pyrite, manganese diselenide is sometimes viewed as being composed of Mn2+ and Se22− ions, although being a semiconductor, MnSe2 is not appropriately described in formal oxidation states.[1][2]

Spectroscopy

The high‐resolution Mn 2p spectra of the MnSe2 has two distinct peaks at 642.2 and 653.9 electronvolts correspond to the Mn 2p3/2 and Mn 2p1/2 spin–orbit components, respectively. The energy difference (Δ 2p) of 11.7 eV confirms the presence of Mn4+ ions in the sample. A good correlation was observed with the literature value for the Mn4+ state.[3] No peaks for Mn2+ ions were observed at 640–641 eV, which confirmed the formation of only the Mn4+ oxidation state with a d3 electronic configuration. The Se 3d spectra were deconvoluted into two well‐defined peaks (3d5/2 and 3d3/2) at a binding energy of 54.46 and 55.31 eV, respectively. These two peaks confirmed the presence of Se2− ions in MnSe2.[4]

References

  1. ^ "The Mn–Se (Manganese–selenium) System" Journal of Phase Equilibria, Volume 19, Number 6, 12/1998, pp.588-590, M. E. Schlesinger doi:10.1361/105497198770341798
  2. ^ The Crystal Structure of Manganese Diselenide and Manganese Ditelluride, Norman Elliott, J. Am. Chem. Soc., 1937, 59 (10), pp 1958–1962 doi:10.1021/ja01289a049
  3. doi:10.1002/aenm.201301960
    .
  4. doi:10.1002/ente.201700097
    .


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