Manganese diselenide

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Manganese(II) diselenide
ECHA InfoCard 100.032.323
Molar mass 212.86 g/mol
Appearance grey, odorless powder
Density 5.55 g/cm3, solid
not listed
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 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