Niobium(IV) iodide

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Niobium(IV) iodide
Names
Other names
Niobium tetraiodide
Identifiers
3D model (
JSmol
)
  • InChI=1S/4HI.Nb/h4*1H;/q;;;;+4/p-4
    Key: RRKNUGROPHXWKT-UHFFFAOYSA-J
  • [I-].[I-].[I-].[I-].[Nb+4]
Properties
I4Nb
Molar mass 600.52425 g·mol−1
Appearance grey solid[1]
Density 5.6 g·cm−3[1]
Melting point 503 °C[1]
reacts[1]
Related compounds
Other anions
 NbF4, NbCl4, NbBr4
Other cations
 TaI4
Related compounds
NbI5
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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.[2]

Properties

Niobium(IV) iodide is a grey solid that reacts with water.[1]

Niobium(IV) iodide is an orthorhombic crystal with space group Cmc21 (No. 36).[3] 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.[4] Niobium(IV) iodide turns into a metal under extremely high pressure.[5]

References

  1. ^
    OCLC 957751024.{{cite book}}: CS1 maint: location missing publisher (link
    )
  2. OCLC 759865801.{{cite book}}: CS1 maint: location missing publisher (link
    )
  3. ISSN 0365-110X
    .
  4. OCLC 846981003
    .
  5. ISSN 0038-1098
    .
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