Niobium(IV) iodide explained

Niobium(IV) iodide is an iodide of niobium, with the chemical formula of NbI4.

Preparation

Niobium(IV) iodide can be obtained by the decomposition of niobium(V) iodide under a vacuum at 206-270 °C.[1]

Properties

Niobium(IV) iodide is a grey solid that reacts with water.

Niobium(IV) iodide is an orthorhombic crystal with space group Cmc21 (No. 36).[2] Its crystal is formed by NbI6 octahedra connected by edges and also contains Nb-Nb bonds. At 348 to 417 °C, the crystal structure of niobium(IV) iodide changes.[3] Niobium(IV) iodide turns into a metal under extremely high pressure.[4]

Notes and References

  1. Book: Perry, Dale L. . Handbook of Inorganic Compounds . Boca Raton, FL . 2011 . 978-1-4398-1462-8 . 759865801 . 298.
  2. Dahl . L. F. . Wampler . D. L. . The crystal structure of α-niobium tetraiodide . Acta Crystallographica . International Union of Crystallography (IUCr) . 15 . 9 . 1962-09-01 . 0365-110X . 10.1107/s0365110x62002340 . 903–911. free .
  3. Book: Gutmann, Viktor . Halogen chemistry. Volume 3 . Academic Press . London . 1967 . 978-0-323-14847-4 . 846981003 . nl . 170.
  4. Kawamura . H. . Matsui . N. . Nakahata . I. . Kobayashi . M. . Akahama . Y. . Shirotani . I. . Structural studies of NbI4 at high pressures . Solid State Communications . Elsevier BV . 108 . 12 . 1998 . 0038-1098 . 10.1016/s0038-1098(98)00483-9 . 919–921. 1998SSCom.108..919K .

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