Praseodymium(III) iodate

Last updated
Praseodymium(III) iodate
Identifiers
3D model (JSmol)
EC Number
  • 239-021-7
PubChem CID
  • InChI=1S/3HIO3.Pr/c3*2-1(3)4;/h3*(H,2,3,4);/q;;;+3/p-3
    Key: CIFGBMZYGQOOKC-UHFFFAOYSA-K
  • [O-]I(=O)=O.[O-]I(=O)=O.[O-]I(=O)=O.[Pr+3]
Properties
Pr(IO3)3
Molar mass 665.62
Density 4.89 g·cm-3 (pentahydrate) [1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Praseodymium(III) iodate is an inorganic compound with the chemical formula Pr(IO3)3.

Contents

Preparation

Praseodymium(III) iodate can be obtained by reacting praseodymium(III) nitrate and potassium iodate in a hot aqueous solution: [2]

Pr(NO3)3 + 3 KIO3 → Pr(IO3)3 + 3 KNO3

Properties

Praseodymium(III) iodate can be thermally decomposed as follows: [3]

7 Pr(IO3)3 → Pr5(IO6)3 + Pr2O3 + 9 I2 + 21 O2

Related Research Articles

<span class="mw-page-title-main">Praseodymium</span> Chemical element, symbol Pr and atomic number 59

Praseodymium is a chemical element; it has symbol Pr and the atomic number 59. It is the third member of the lanthanide series and is considered one of the rare-earth metals. It is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. It is too reactive to be found in native form, and pure praseodymium metal slowly develops a green oxide coating when exposed to air.

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

Praseodymium(III) chloride is the inorganic compound with the formula PrCl3. Like other lanthanide trichlorides, it exists both in the anhydrous and hydrated forms. It is a blue-green solid that rapidly absorbs water on exposure to moist air to form a light green heptahydrate.

Praseodymium(III,IV) oxide is the inorganic compound with the formula Pr6O11 that is insoluble in water. It has a cubic fluorite structure. It is the most stable form of praseodymium oxide at ambient temperature and pressure.

The iodate fluorides are chemical compounds which contain both iodate and fluoride anions (IO3− and F−). In these compounds fluorine is not bound to iodine as it is in fluoroiodates.

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

Terbium(IV) fluoride is an inorganic compound with a chemical formula TbF4. It is a white solid that is a strong oxidizer. It is also a strong fluorinating agent, emitting relatively pure atomic fluorine when heated, rather than the mixture of fluoride vapors emitted from cobalt(III) fluoride or cerium(IV) fluoride. It can be produced by the reaction between very pure terbium(III) fluoride and xenon difluoride, chlorine trifluoride or fluorine gas:

Praseodymium monophosphide is an inorganic compound of praseodymium and phosphorus with the chemical formula PrP. The compound forms crystals.

Neodymium nickelate is a nickelate of neodymium with a chemical formula NdNiO3. In this compound, the neodymium atom is in the +3 oxidation state.

<span class="mw-page-title-main">Praseodymium arsenate</span> Chemical compound

Praseodymium arsenate is the arsenate salt of praseodymium, with the chemical formula of PrAsO4. It has good thermal stability. Its ferroelectric transition temperature is 52°C.

<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.

Samarium compounds are compounds formed by the lanthanide metal samarium (Sm). In these compounds, samarium generally exhibits the +3 oxidation state, such as SmCl3, Sm(NO3)3 and Sm(C2O4)3. Compounds with samarium in the +2 oxidation state are also known, for example SmI2.

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

Praseodymium(III) phosphate is an inorganic compound with the chemical formula PrPO4.

Lanthanum(III) iodate is an inorganic compound with the chemical formula La(IO3)3.

Neodymium(III) iodate is an inorganic compound with the chemical formula Nd(IO3)3.

Thulium iodate is an inorganic compound with the chemical formula Tm(IO3)3. It can be prepared by the hydrothermal reaction of periodic acid and thulium periodate in water at 160 °C. Its crystals can also be crystallized in boiling nitric acid. Its solubility in water is 1.467±0.001 (25 °C, 103 mol·dm−3). Adding dimethyl sulfoxide to water will reduce the solubility.

Ytterbium(III) iodate is an inorganic compound with the chemical formula Yb(IO3)3. Its dihydrate can be prepared by reacting ytterbium sulfate and iodic acid in water at 200 °C. It crystallizes in the P21/c space group, with unit cell parameters a=8.685, b=6.066, c=16.687 Å, β=115.01°.

Lutetium iodate is an inorganic compound with the chemical formula Lu(IO3)3. It exists in two anhydrous forms, α-form and β-form, as well as dihydrate and tetrahydrate. It can be produced by the reaction of lutetium nitrate and iodic acid or potassium iodate. It decomposes when heated to generate lutetium oxide.

Promethium iodate is an inorganic compound with the chemical formula Pm(IO3)3. It can be obtained by reacting with potassium iodate, ammonium iodate or a slight excess of iodic acid and Pm3+ solution and precipitating it. Its hydrate, Pm(IO3)3·H2O, crystallizes in the P21 space group, with unit cell parameters a=10.172±13, b=6.700±20, c=7.289±24 Å, β=113.1±0.2°.

Terbium(III) iodate is an inorganic compound with the chemical formula Tb(IO3)3. It can be obtained by the reaction of terbium(III) periodate and periodic acid in water at 160 °C, or by the hydrothermal reaction of terbium(III) nitrate or terbium(III) chloride and iodic acid at 200 °C. It crystallizes in the monoclinic crystal system, with space group P21/c and unit cell parameters a=7.102, b=8.468, c=13.355 Å, β=99.67°.

Dysprosium iodate is an inorganic compound with the chemical formula Dy(IO3)3. It can be obtained by the reaction of dysprosium nitrate or dysprosium chloride and iodic acid at 200 °C. It exists in two crystal forms: α-form and β-form. Its solubility in water is 1.010±0.001 (25 °C, 103 mol·dm−3). Adding ethanol or methanol to water will reduce the solubility.

Samarium iodate is an inorganic compound with the chemical formula Sm(IO3)3.

References

  1. ↑ Abrahams, S.C.; Bernstein, J.L.; Nassau, K. (Jan 1976). "Transition metal iodates. VII. Crystallographic and nonlinear optic survey of the 4f-iodates". Journal of Solid State Chemistry. 16 (1–2): 173–184. Bibcode:1976JSSCh..16..173A. doi:10.1016/0022-4596(76)90020-7.
  2. ↑ Roy, Ajoy; Ghosh, Bijoy Prosad; Nag, K. (Jul 1981). "Phase transition behavior of rare earth iodates". Thermochimica Acta. 47 (1): 105–108. doi:10.1016/0040-6031(81)85012-5.
  3. ↑ Ghosh, B. P.; Nag, K. (Jul 1985). "Thermal and dielectric properties of rare earth iodates". Journal of Materials Science. 20 (7): 2335–2344. Bibcode:1985JMatS..20.2335G. doi:10.1007/bf00556063. ISSN   0022-2461.
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