Iridium disulfide

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Iridium disulfide
Kristallstruktur Pyrit.png
3D model (JSmol)
  • InChI=1S/Ir.2S
  • [S].[S].[Ir]
Molar mass 256.349
Density 9300 kg m–3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Iridium disulfide is the binary inorganic compound with the formula IrS2. Prepared by the direct reaction of the elements, the compound adopts the pyrite crystal structure at high pressure.[1] At normal atmospheric pressures, an orthorhombic polymorph is observed.[2]. The high- and low-pressure forms both feature octahedral Ir centers, but the S–S distances are pressure dependent.[3] Although not practical, IrS2 is a highly active catalyst for hydrodesulfurization.[4]


  1. ^ Munson, Ronald A. (February 1968). "The synthesis of iridium disulfide and nickel diarsenide having the pyrite structure" (PDF). Inorganic Chemistry. 7 (2): 389–390. doi:10.1021/ic50060a047.
  2. ^ Jobic, S.; Deniard, P.; Brec, R.; Rouxel, J.; Drew, M. G. B.; David, W. I. F. "Properties of the transition metal dichalcogenides: the case of IrS2 and IrSe2". Journal of Solid State Chemistry. 89: 315–327. doi:10.1016/0022-4596(90)90273-Z.
  3. ^ Vaughan, David J.; Craig, James R. (1978). Mineral chemistry of metal sulfides. Cambridge Earth Science Series. Cambridge: Cambridge University Press. ISBN 0521214890.
  4. ^ Chianelli, R. R.; Berhault, G.; Raybaud, P.; Kasztelan, S.; Hafner, J.; Toulhoat, H. (8 March 2002). "Periodic trends in hydrodesulfurization: in support of the Sabatier principle". Applied Catalysis A: General. 227 (1–2): 83–96. doi:10.1016/S0926-860X(01)00924-3.