Chemistry:Tantalum(V) iodide
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| Other names
Tantalum pentaiodide
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3D model (JSmol)
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| Properties | |
| Ta2I10 | |
| Molar mass | 1631 |
| Appearance | black solid |
| Density | 5.8 g/cm3 |
| Melting point | 382[1] °C (720 °F; 655 K) sublimes |
| Hazards | |
| GHS pictograms |  
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| GHS Signal word | Danger |
| H314, H331 | |
| P260, P261, P264, P271, P280, P301+330+331, P303+361+353, P304+340, P305+351+338, P310, P311, P321, P363, P403+233, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Tantalum(V) iodide is the inorganic compound with the formula Ta2I10. Its name comes from the compound's empirical formula, TaI5.[2] It is a diamagnetic, black solid that hydrolyses readily. The compound adopts an edge-shared bioctahedral structure, which means that two TaI5 units are joined by a pair of iodide bridges. There is no bond between the Ta centres.[3] Niobium(V) chloride, niobium(V) bromide, niobium(V) iodide, tantalum(V) chloride, and tantalum(V) bromide all share this structural motif.
Synthesis and structure
Tantalum pentaiodide forms from the reaction of tantalum pentoxide with aluminium triiodide:[4]
- 3 Ta2O5 + 10 AlI3 → 6 TaI5 + 5 Al2O3
References
- ↑ McCarley, R. E.; Boatman, J.C. (1965). "The Equilibrium Phase Diagrams for the Tantalum-Tantalum Bromide and Tantalum-Tantalum Iodide Systems". Inorganic Chemistry 4 (10): 1486–1491. doi:10.1021/ic50032a029. https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=4835&context=rtd.
- ↑ Greenwood, N. N.; & Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford: Butterworth-Heinemann. ISBN:0-7506-3365-4.
- ↑ Müller, U. (1979). "Die Kristallstruktur von Tantalpentajodid und ihre Fehlordnung". Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry 35 (11): 2502–2509. doi:10.1107/S0567740879009778.
- ↑ G. Braurer (1963). "Niobium(V) and Tantalum(V) Bromides". in G. Brauer. Handbook of Preparative Inorganic Chemistry, 2nd Ed.. 1. NY, NY: Academic Press. pp. 1311.
| HI | He | ||||||||||||||||
| LiI | BeI2 | BI3 | CI4 | NI3 | I2O4, I2O5, I4O9 |
IF, IF3, IF5, IF7 |
Ne | ||||||||||
| NaI | MgI2 | AlI3 | SiI4 | PI3, P2I4 |
S | ICl, ICl3 |
Ar | ||||||||||
| KI | CaI2 | Sc | TiI4 | VI3 | CrI3 | MnI2 | FeI2 | CoI2 | NiI2 | CuI | ZnI2 | Ga2I6 | GeI2, GeI4 |
AsI3 | Se | IBr | Kr |
| RbI | SrI2 | YI3 | ZrI4 | NbI5 | Mo | Tc | Ru | Rh | Pd | AgI | CdI2 | InI3 | SnI4, SnI2 |
SbI3 | TeI4 | I | Xe |
| CsI | BaI2 | HfI4 | TaI5 | W | Re | Os | Ir | Pt | AuI | Hg2I2, HgI2 |
TlI | PbI2 | BiI3 | Po | AtI | Rn | |
| Fr | RaI2 | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og | |
| ↓ | |||||||||||||||||
| La | Ce | Pr | Nd | Pm | SmI2 | Eu | Gd | TbI3 | Dy | Ho | Er | Tm | Yb | Lu | |||
| Ac | ThI4 | Pa | UI3, UI4 |
Np | Pu | Am | Cm | Bk | Cf | EsI3 | Fm | Md | No | Lr | |||
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