Niobium(IV) iodide
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| Names | |
|---|---|
| Other names
Niobium tetraiodide
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| Identifiers | |
3D model (JSmol)
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|
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| 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
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NbF4, NbCl4, NbBr4 |
Other cations
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TaI4 |
Related compounds
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NbI3, NbI5 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Niobium(IV) iodide is an iodide of niobium, with the chemical formula of NbI4.
Preparation
[edit]Niobium(IV) iodide can be obtained by the decomposition of niobium(V) iodide under a vacuum at 206-270 °C.[2]
Properties
[edit]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
[edit]- ^ a b c d e Haynes, William M.; Lide, David R.; Bruno, Thomas J. (2017). CRC handbook of chemistry and physics : a ready-reference book of chemical and physical data. Boca Raton, Florida. p. 76. ISBN 978-1-4987-5429-3. OCLC 957751024.
((cite book)): CS1 maint: location missing publisher (link) - ^ Perry, Dale L. (2011). Handbook of Inorganic Compounds. Boca Raton, FL. p. 298. ISBN 978-1-4398-1462-8. OCLC 759865801.
((cite book)): CS1 maint: location missing publisher (link) - ^ Dahl, L. F.; Wampler, D. L. (1962-09-01). "The crystal structure of α-niobium tetraiodide". Acta Crystallographica. 15 (9). International Union of Crystallography (IUCr): 903–911. doi:10.1107/s0365110x62002340. ISSN 0365-110X.
- ^ Gutmann, Viktor (1967). Halogen chemistry. Volume 3 (in Dutch). London: Academic Press. p. 170. ISBN 978-0-323-14847-4. OCLC 846981003.
- ^ Kawamura, H.; Matsui, N.; Nakahata, I.; Kobayashi, M.; Akahama, Y.; Shirotani, I. (1998). "Structural studies of NbI4 at high pressures". Solid State Communications. 108 (12). Elsevier BV: 919–921. Bibcode:1998SSCom.108..919K. doi:10.1016/s0038-1098(98)00483-9. ISSN 0038-1098.
| Niobium(II) | |||
|---|---|---|---|
| Niobium(III) | |||
| Niobium(IV) | |||
| Niobium(V) |
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Salts and covalent derivatives of the iodide ion | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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