Curium(III) iodide

Last updated
Curium(III) iodide
Kristallstruktur Bismut(III)-iodid.png
Names
Other names
Curium triiodide
Identifiers
3D model (JSmol)
PubChem CID
  • InChI=1S/Cm.3HI/h;3*1H/q+3;;;/p-3
    Key: UVXBBRRWLDYFRE-UHFFFAOYSA-K
  • [I-].[I-].[I-].[Cm+3]
Properties
CmI3
Molar mass 628 g·mol−1
Appearancewhite crystals
Related compounds
Related compounds
 Americium triiodide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Curium(III) iodide is the chemical compound with the formula CmI3. [1] [2] [3] Since all isotopes of curium are only artificially produced, the compound has no natural occurrence.

Contents

Synthesis

Elemental curium and iodine can be reacted to synthesize curium(III) iodide. [4]

2Cm + 3I2 → 2CmI3

Also by the reaction of curium(III) chloride with ammonium iodide: [5] [6]

CmCl3 + 3NH4I → CmI3 + 3NH4Cl

Physical properties

Curium(III) iodide is a colorless ionic compound consisting of Cm3+ and I− ions. It forms white crystals the hexagonal crystal system in the space group R3 (space group no. 148) with the lattice parameters a = 744 pm and c = 2040 pm with six units per unit cell. Its crystal structure is isotypic with that of bismuth(III) iodide. [5] [7]

Related Research Articles

<span class="mw-page-title-main">Curium</span> Chemical element, symbol Cm and atomic number 96

Curium is a synthetic chemical element; it has symbol Cm and atomic number 96. This transuranic actinide element was named after eminent scientists Marie and Pierre Curie, both known for their research on radioactivity. Curium was first intentionally made by the team of Glenn T. Seaborg, Ralph A. James, and Albert Ghiorso in 1944, using the cyclotron at Berkeley. They bombarded the newly discovered element plutonium with alpha particles. This was then sent to the Metallurgical Laboratory at University of Chicago where a tiny sample of curium was eventually separated and identified. The discovery was kept secret until after the end of World War II. The news was released to the public in November 1947. Most curium is produced by bombarding uranium or plutonium with neutrons in nuclear reactors – one tonne of spent nuclear fuel contains ~20 grams of curium.

Terbium(III) iodide (TbI3) is an inorganic chemical compound.

<span class="mw-page-title-main">Berkelium compounds</span> Any chemical compound having at least one berkelium atom

Berkelium forms a number of chemical compounds, where it normally exists in an oxidation state of +3 or +4, and behaves similarly to its lanthanide analogue, terbium. Like all actinides, berkelium easily dissolves in various aqueous inorganic acids, liberating gaseous hydrogen and converting into the trivalent oxidation state. This trivalent state is the most stable, especially in aqueous solutions, but tetravalent berkelium compounds are also known. The existence of divalent berkelium salts is uncertain and has only been reported in mixed lanthanum chloride-strontium chloride melts. Aqueous solutions of Bk3+ ions are green in most acids. The color of the Bk4+ ions is yellow in hydrochloric acid and orange-yellow in sulfuric acid. Berkelium does not react rapidly with oxygen at room temperature, possibly due to the formation of a protective oxide surface layer; however, it reacts with molten metals, hydrogen, halogens, chalcogens and pnictogens to form various binary compounds. Berkelium can also form several organometallic compounds.

<span class="mw-page-title-main">Einsteinium(III) iodide</span> Chemical compound

Einsteinium triiodide is an iodide of the synthetic actinide einsteinium which has the molecular formula EsI3. This crystalline salt is an amber-coloured solid. It glows red in the dark due to einsteinium's intense radioactivity.

Americium(III) iodide or americium triiodide is the chemical compound, a salt composed of americium and iodine with the formula AmI3.

<span class="mw-page-title-main">Curium(III) fluoride</span> Chemical compound

Curium(III) fluoride or curium trifluoride is the chemical compound composed of curium and fluorine with the formula CmF3. It is a white, nearly insoluble salt that has the same crystal structure as LaF3. It precipitates as a hydrate when fluoride ions are added to a weakly acidic Cm(III) solution; alternatively it can be synthesized by reacting hydrofluoric acid with Cm(OH)3. The anhydrous form is then obtained by desiccation or by treatment with hydrogen fluoride gas.

Cerium(III) iodide (CeI3) is the compound formed by cerium(III) cations and iodide anions.

Curium compounds are compounds containing the element curium (Cm). Curium usually forms compounds in the +3 oxidation state, although compounds with curium in the +4, +5 and +6 oxidation states are also known.

Curium(III) bromide is the bromide salt of curium. It has an orthorhombic crystal structure.

<span class="mw-page-title-main">Praseodymium(III) iodide</span> Chemical compound

Praseodymium(III) iodide is an inorganic salt, consisting of the rare-earth metal praseodymium and iodine, with the chemical formula PrI3. It forms green crystals. It is soluble in water.

<span class="mw-page-title-main">Zirconium(III) iodide</span> Chemical compound

Zirconium(III) iodide is an inorganic compound with the formula ZrI3.

<span class="mw-page-title-main">Lanthanum(III) iodide</span> Chemical compound

Lanthanum(III) iodide is an inorganic compound containing lanthanum and iodine with the chemical formula LaI
3.

Europium(III) iodide is an inorganic compound containing europium and iodine with the chemical formula EuI3.

<span class="mw-page-title-main">Holmium(III) iodide</span> Chemical compound

Holmium(III) iodide is an iodide of holmium, with the chemical formula of HoI3. It is used as a component of metal halide lamps.

Americium compounds are compounds containing the element americium (Am). These compounds can form in the +2, +3, and +4, although the +3 oxidation state is the most common. The +5, +6 and +7 oxidation states have also been reported.

<span class="mw-page-title-main">Hafnium(III) iodide</span> Chemical compound

Hafnium(III) iodide is an inorganic compound of hafnium and iodine with the formula Hf I3. It is a black solid.

<span class="mw-page-title-main">Berkelium(III) iodide</span> Chemical compound

Berkelium(III) iodide is a binary inorganic compound of berkelium and iodine with the chemical formula BkI3.

<span class="mw-page-title-main">Curium(IV) fluoride</span> Chemical compound

Curium(IV) fluoride is an inorganic chemical compound of curium and fluorine with the chemical formula CmF4.

<span class="mw-page-title-main">Curium(IV) oxide</span> Chemical compound

Curium(IV) oxide is an inorganic chemical compound of curium and oxygen with the chemical formula CmO2. Since all isotopes of curium are man-made, the compound does not occur in nature.

<span class="mw-page-title-main">Plutonium(III) iodide</span> Chemical compound

Plutonium(III) iodide is the iodide of plutonium with the chemical formula PuI3.

References

  1. ↑ Lumetta, Gregg J.; Thompson, Major C.; Penneman, Robert A.; Eller, P. Gary (2006). "Curium". The Chemistry of the Actinide and Transactinide Elements. Springer Netherlands. pp. 1397–1443. doi:10.1007/1-4020-3598-5_9. ISBN   978-1-4020-3598-2 . Retrieved 3 July 2023.
  2. ↑ Brown, David; Canterford, J. H.; Colton, Ray (1968). Halides of the Transition Elements: Halides of the lanthanides and actinides, by D. Brown. Wiley. p. 260. ISBN   978-0-470-10840-6 . Retrieved 3 July 2023.
  3. ↑ "WebElements Periodic Table » Curium » curium triiodide". winter.group.shef.ac.uk. Retrieved 3 July 2023.
  4. ↑ Seaborg, G. T.; James, R. A.; Ghiorso, A. (1949). "The Transuranium Elements". Science. McGraw-Hill. 104 (2704): 1554–1571. JSTOR   1675046 . Retrieved 3 July 2023.
  5. 1 2 Asprey, L. B.; Keenan, T. K.; Kruse, F. H. (July 1965). "Crystal Structures of the Trifluorides, Trichlorides, Tribromides, and Triiodides of Americium and Curium" (PDF). Inorganic Chemistry . 4 (7): 985–986. doi:10.1021/ic50029a013. ISSN   0020-1669. S2CID   96551460 . Retrieved 3 July 2023.
  6. ↑ Koch, Günter (5 October 2013). Transurane: Teil C: Die Verbindungen (in German). Springer-Verlag. p. 154. ISBN   978-3-662-11547-3 . Retrieved 3 July 2023.
  7. ↑ Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3046. ISBN   978-0-412-30120-9 . Retrieved 3 July 2023.
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