Neodymium(III) iodide: Difference between revisions
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'''Neodymium(III) iodide''' is an [[inorganic]] salt of [[iodine]] and [[neodymium]] the formula NdI<sub>3</sub>.<ref name="Ezhov">Ezhov, Y.S., Komarov, S.A. & Sevast’yanov, V.G. Refinement of molecular constants of neodymium triiodide by electron diffraction. ''J Struct Chem '''''41''', 593–596 (2000). https://doi.org/10.1007/BF02683920</ref> Neodymium uses the +3 oxidation state in the compound. The |
'''Neodymium(III) iodide''' is an [[inorganic]] salt of [[iodine]] and [[neodymium]] with the formula NdI<sub>3</sub>.<ref name="Ezhov">Ezhov, Y.S., Komarov, S.A. & Sevast’yanov, V.G. Refinement of molecular constants of neodymium triiodide by electron diffraction. ''J Struct Chem '''''41''', 593–596 (2000). https://doi.org/10.1007/BF02683920</ref> Neodymium uses the +3 oxidation state in the compound. The anhydrous compound<ref name="PubChem" /> is a green powdery<ref name="PubChem" /> solid at room temperature. |
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==Preparation== |
==Preparation== |
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{{Unreferenced section|date=July 2022}} |
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: 2 Nd + 3 I<sub>2</sub> → 2 NdI<sub>3</sub> |
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It can also be prepared by the reaction of [[neodymium(III) oxide]] and [[hydroiodic acid]] to make a hydrate:<ref name=":0">{{Cite journal |last=Kutscher |first=J. |last2=Schneider |first2=A. |date=1971-09-01 |title=Notiz zur Präparation von wasserfreien Lanthaniden-Haloge-niden, Insbesondere von Jodiden |url=https://www.sciencedirect.com/science/article/pii/0020165071802532 |journal=Inorganic and Nuclear Chemistry Letters |language=de |volume=7 |issue=9 |pages=815–819 |doi=10.1016/0020-1650(71)80253-2 |issn=0020-1650}}</ref> |
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: Nd<sub>2</sub>O<sub>3</sub> + 6 HI → 2 NdI<sub>3</sub> + 3 H<sub>2</sub>O |
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:<math>\mathsf{2Nd + 3I_2 \ \xrightarrow{T}\ 2NdI_3}</math> |
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The anhydrate can then be obtained by heating the nonahydrate with ammonium iodide:<ref name=":0" /> |
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: NdI<sub>3</sub> • 9 H<sub>2</sub>O + nNH<sub>4</sub>I → NdI<sub>3</sub> + nNH<sub>3</sub> + nHI + 9H<sub>2</sub>O |
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Heat the nonahydrate with ammonium iodide to prevent hydrolysis: |
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:<math>\mathsf{ NdI_3\cdot 9 H_2O + nNH_4I \ \xrightarrow{T}\ NdI_3 + nNH_3 + nHI + 9H_2O}</math> |
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==Physical Properties== |
==Physical Properties== |
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Revision as of 03:02, 30 March 2023
| Names | |
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| IUPAC name
Triiodoneodymium
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| Other names
Neodymium triiodide, Neodymium iodide
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.034.047 |
| EC Number |
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| NdI3 | |
| Molar mass | 524.96 g/mol |
| Appearance | Green solid |
| Melting point | 684 °C (1,263 °F; 957 K) |
| Structure | |
| 9 | |
| Hazards | |
| GHS labelling: | |
   [1]
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| Danger[2] | |
| Related compounds | |
Other anions
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Neodymium acetate, Neodymium hydride, Neodymium nickelate |
Other cations
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erbium iodide, cerium iodide, terbium iodide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Neodymium(III) iodide is an inorganic salt of iodine and neodymium with the formula NdI3.[3] Neodymium uses the +3 oxidation state in the compound. The anhydrous compound[2] is a green powdery[2] solid at room temperature.
Preparation
Heating neodymium and iodine in an inert atmosphere produces a salt:[citation needed]
- 2 Nd + 3 I2 → 2 NdI3
It can also be prepared by the reaction of neodymium(III) oxide and hydroiodic acid to make a hydrate:[4]
- Nd2O3 + 6 HI → 2 NdI3 + 3 H2O
The anhydrate can then be obtained by heating the nonahydrate with ammonium iodide:[4]
- NdI3 • 9 H2O + nNH4I → NdI3 + nNH3 + nHI + 9H2O
Physical Properties
Neodymium(III) iodide forms green, water-soluble hygroscopic crystals. It has a melting point of 784°C. It forms a nonahydrate crystal NdI3.9H2O – belongs to the orthorhombic crystal system, space group Pmmn, lattice constants a = 1.16604 nm, b = 0.80103 nm, c = 0.89702 nm, Z = 4.[5]
Other compounds
NdI3 also forms some compounds with N2H4, such as NdI3·3N2H4·2H2O which is a dark green crystal, soluble in methanol and ethanol and insoluble in water, benzene and toluene, d20°C = 3.42 g/cm³.[6]
NdI3 also forms some compounds with urea, such as NdI3 5CO(NH2)2 which is a lavender color crystal.[7]
NdI3 also forms some compounds with thiourea, such as NdI3·2CS(NH2)2·9H2O which is a pale pink crystal.[8]
See also
References
- ^ See https://onyxmet.com/index.php?route=product/product&product_id=2733
- ^ a b c See https://pubchem.ncbi.nlm.nih.gov/compound/Neodymium-triiodide#datasheet=LCSS
- ^ Ezhov, Y.S., Komarov, S.A. & Sevast’yanov, V.G. Refinement of molecular constants of neodymium triiodide by electron diffraction. J Struct Chem 41, 593–596 (2000). https://doi.org/10.1007/BF02683920
- ^ a b Kutscher, J.; Schneider, A. (1971-09-01). "Notiz zur Präparation von wasserfreien Lanthaniden-Haloge-niden, Insbesondere von Jodiden". Inorganic and Nuclear Chemistry Letters (in German). 7 (9): 815–819. doi:10.1016/0020-1650(71)80253-2. ISSN 0020-1650.
- ^ T. Timofte, A. Babai, G. Meyer and A.-V. Mudring (2005). "Neodymium triiodide nonahydrate". Acta Crystallographica Section E. E61 (5): i87 – i88. doi:10.1107/S160053680501216X.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ Uchenye zapiski: Serii︠a︡ khimicheskikh nauk (S.M. Kirov adyna Azărbai̐jan Dȯvlăt Universiteti; 1975), page 78. Retrieved January 13, 2021. (Translated from Vietnamese)
- ^ Russian Journal of Inorganic Chemistry, Episode 18, Part 2 (British Library Lending Division with the cooperation of the Royal Society of Chemistry, 1973), page 1655. Retrieved 13 January 2021.
- ^ Alikberova L.Yu., Albov D.V., Antonenko T.A., Kochetova I.M., Rukk N.S. — Thiourea complexes of neodymium(III) and gadolinium(III) iodides. synthesis and structure. Fine Chemical Technologies. 2010, 5 (3): 30–33. (in Russian).