Holmium(III) iodide

Last updated
Holmium(III) iodide
Kristallstruktur Bismut(III)-iodid.png
Names
Other names
Holmium iodide
Holmium triiodide
Identifiers
3D model (JSmol)
ECHA InfoCard 100.034.050 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 237-470-3
PubChem CID
  • InChI=1S/Ho.3HI/h;3*1H/q+3;;;/p-3
    Key: KXCRAPCRWWGWIW-UHFFFAOYSA-K
  • [Ho+3].[I-].[I-].[I-]
Properties
HoI3
AppearancePale-yellow solid [1] [2]
Density 5.4 g/cm3 [3]
Melting point 994 °C [2]
Boiling point 1300 °C [4]
soluble in water [2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Holmium(III) iodide is an iodide of holmium, with the chemical formula of HoI3. It is used as a component of metal halide lamps. [5]

Contents

Preparation

Holmium(III) iodide can be obtained by directly reacting holmium and iodine: [4]

2 Ho + 3 I2 → 2 HoI3

Holmium(III) iodide can also be obtained via the direct reaction between holmium and mercury(II) iodide:

2 Ho + 3 HgI2 → 2 HoI3 + 3 Hg

The mercury produced in the reaction can be removed by distillation. [6]

Holmium(III) iodide hydrate can be converted to the anhydrous form by dehydration with a large excess of ammonium iodide (since the compound is prone to hydrolysis). [4]

Properties

Holmium(III) iodide is a highly hygroscopic substance that dissolves in water. [7] [3] [2] It forms yellow hexagonal crystals with a crystal structure similar to bismuth(III) iodide. [4] In air, it quickly absorbs moisture and forms hydrates. The corresponding oxide iodide is also readily formed at elevated temperature. [4]

Related Research Articles

In chemistry, a halide is a binary chemical compound, of which one part is a halogen atom and the other part is an element or radical that is less electronegative than the halogen, to make a fluoride, chloride, bromide, iodide, astatide, or theoretically tennesside compound. The alkali metals combine directly with halogens under appropriate conditions forming halides of the general formula, MX. Many salts are halides; the hal- syllable in halide and halite reflects this correlation. All Group 1 metals form halides that are white solids at room temperature.

Nickel(II) iodide Chemical compound

Nickel(II) iodide is an inorganic compound with the formula NiI2. This paramagnetic black solid dissolves readily in water to give bluish-green solutions, from which crystallizes the aquo complex [Ni(H2O)6]I2 (image above). This bluish-green colour is typical of hydrated nickel(II) compounds. Nickel iodides find some applications in homogeneous catalysis.

Gallium(III) iodide Chemical compound

Gallium(III) iodide is the inorganic compound with the formula GaI3. A yellow hygroscopic solid, it is the most common iodide of gallium. In the chemical vapor transport method of growing crystals of gallium arsenide uses iodine as the transport agent. In the solid state, it exists as the dimer Ga2I6.

Thallium(I) iodide Chemical compound

Thallium(I) iodide is a chemical compound with the formula TlI. It is unusual in being one of the few water-insoluble metal iodides, along with AgI, CuI, SnI2, SnI4, PbI2 and HgI2.

Uranium(III) iodide Chemical compound

Uranium triiodide is an inorganic compound with the chemical formula UI3. It is a black solid that is soluble in water.

Iron(II) iodide is an inorganic compound with the chemical formula FeI2. It is used as a catalyst in organic reactions.

Scandium triiodide Chemical compound

Scandium triiodide, also known as scandium iodide, is an inorganic compound with the formula ScI3 and is classified as a lanthanide iodide. This salt is a yellowish powder. It is used in metal halide lamps together with similar compounds, such as caesium iodide, because of their ability to maximize emission of UV and to prolong bulb life. The maximized UV emission can be tuned to a range that can initiate photopolymerizations.

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

Vanadium(II) iodide Chemical compound

Vanadium(II) iodide is the inorganic compound with the formula VI2. It is a black micaceous solid. It adopts the cadmium iodide structure, featuring octahedral V(II) centers. The hexahydrate is also known. It forms purple crystals.

The telluride iodides are chemical compounds that contain both telluride ions (Te2−) and iodide ions (I−). They are in the class of mixed anion compounds or chalcogenide halides.

Neodymium(II) iodide Chemical compound

Neodymium(II) iodide or neodymium diiodide is an inorganic salt of iodine and neodymium the formula NdI2. Neodymium uses the +2 oxidation state in the compound.

Arsenide iodides or iodide arsenides are compounds containing anions composed of iodide (I−) and arsenide (As3−). They can be considered as mixed anion compounds. They are in the category of pnictidehalides. Related compounds include the arsenide chlorides, arsenide bromides, phosphide iodides, and antimonide iodides.

Praseodymium(III) iodide Chemical compound

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

Holmium acetate Compound of holmium

Holmium acetate is the acetate salt of holmium, with a chemical formula of Ho(CH3COO)3.

Praseodymium diiodide Chemical compound

Praseodymium diiodide is a chemical compound with the empirical formula of PrI2, consisting of praseodymium and iodine. It is an electride, with the ionic formula of Pr3+(I−)2e−, and therefore not a true praseodymium(II) compound.

Lanthanum(III) iodide Chemical compound

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

Dysprosium(III) bromide Chemical compound

Dysprosium(III) bromide is an inorganic compound of bromine and dysprosium, with the chemical formula of DyBr3.

Lutetium(III) iodide Chemical compound

Lutetium(III) iodide or lutetium iodide is an inorganic compound consisting of iodine and lutetium, with the chemical formula of LuI3.

Gadolinium(III) iodide Chemical compound

Gadolinium(III) iodide is an iodide of gadolinium, with the chemical formula of GdI3. It is a yellow, highly hygroscopic solid with a bismuth(III) iodide-type crystal structure. In air, it quickly absorbs moisture and forms hydrates. The corresponding oxide iodide is also readily formed at elevated temperature.

Thulium(III) iodide Chemical compound

Thulium(III) iodide is an iodide of thulium, with the chemical formula of TmI3. Thulium(III) iodide is used as a component of metal halide lamps.

References

  1. ↑ Jantsch, G.; Jawurek, H.; Skalla, N.; Gawalowski, H. (1932). "Zur Kenntnis der Halogenide der seltenen Erden. VI. Über die Halogenide der Terbin- und Erbinerdengruppe" [Halides of the rare earths. VI. Halides of the terbium and erbium earth groups]. Zeitschrift für Anorganische und Allgemeine Chemie (in German). 207 (4): 353–367. doi:10.1002/zaac.19322070404.
  2. 1 2 3 4 "13635 Holmium(III) iodide, ultra dry, 99.99% (REO)". Alfa Aesar. Retrieved 2022-08-20.
  3. 1 2 Carl L. Yaws (2015). The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. Gulf Professional Publishing. p. 301. ISBN   978-0128011461 . Retrieved 2017-08-28.
  4. 1 2 3 4 5 Georg Brauer (Hrsg.), unter Mitarbeit von Marianne Baudler u. a.: Handbuch der Präparativen Anorganischen Chemie. 3., umgearbeitete Auflage. Band I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6, S. 1077.
  5. ↑ Flesch, Peter G. (2007). Light and Light Sources: High-Intensity Discharge Lamps. Springer. p. 45. ISBN   978-3540326854.
  6. ↑ Asprey, L. B.; Keenan, T. K.; Kruse, F. H. (1964). "Preparation and crystal data for lanthanide and actinide triiodides". Inorganic Chemistry. 3 (8): 1137–1141. doi:10.1021/ic50018a015.
  7. ↑ "Holmium triiodide". WebElements. Retrieved 2022-08-20.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.