Manganese diselenide

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Manganese(II) diselenide
CAS number 12299-98-8 or 524744-79-4
PubChem 83014
Molecular formula MnSe2
Molar mass 212.86 g/mol
Appearance grey, odorless powder
Density 5.55 g/cm3, solid
Solubility in water insoluble
EU classification not listed
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Manganese(II) diselenide is the inorganic compound with the formula MnSe2. This rarely encountered solid is structurally similar to that of 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]


  1. ^ "The Mn-Se (Manganese-selenium) System" Journal of Phase Equilibria , Volume 19, Number 6 , 12/1998 , pp.588-590, M. E. Schlesinger , online abstract via
  2. ^ The Crystal Structure of Manganese Diselenide and Manganese Ditelluride , Norman Elliott , J. Am. Chem. Soc., 1937, 59 (10) , pp 1958–1962 , online abstract via