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Neodymium(III) oxide

| publication-place = Boca Raton, FL Neodymium(III) chloride Praseodymium(III) oxide Promethium(III) oxide

Neodymium(III) oxide or neodymium sesquioxide is the chemical compound composed of neodymium and oxygen with the formula Nd2O3. It forms very light grayish-blue hexagonal crystals. The rare-earth mixture didymium, previously believed to be an element, partially consists of neodymium(III) oxide. | publication-place = New York | access-date = 2009-03-18

Uses

Neodymium(III) oxide is used to dope glass, including sunglasses, to make solid-state lasers, and to color glasses and enamels. | access-date = 2009-03-18 | access-date = 2009-03-18 | access-date = 2009-03-18 About 7000 tonnes of neodymium(III) oxide are produced worldwide each year. Neodymium(III) oxide is also used as a polymerization catalyst.

Reactions

Neodymium(III) oxide is formed when neodymium(III) nitride or neodymium(III) hydroxide is roasted in air. | publication-place = London | access-date = 2009-03-18

Structure

Neodymium(III) oxide has a low-temperature trigonal A form in space group Pm1. This structure type is favoured by the early lanthanides. At higher temperatures it adopts two other forms, the hexagonal H form in space group P63/mmc and the cubic X form in Imm. The high-temperature forms exhibit crystallographic disorder.

PackingNeodymium coordinationOxygen O1 coordinationOxygen O2 coordination
[[File:A-Nd2O3-xtal-3x3x3-3D-bs-17.png150px]][[File:A-Nd2O3-xtal-Nd-coordination-3D-bs-17.png150px]][[File:A-Nd2O3-xtal-O1-coordination-3D-bs-17.png150px]][[File:A-Nd2O3-xtal-O2-coordination-3D-bs-17.png150px]]
A-M2O3 structure typeapproximately capped octahedraloctahedralapproximately tetrahedral

References

References

  1. D. Taylor. (1984). "Thermal Expansion Data: III Sesquioxides, U2N3, with the corundum and the A-, B- and C-M2O3 structures". [[Transactions and Journal of the British Ceramic Society.
  2. {{Greenwood&Earnshaw2nd
  3. A. F. Wells. (1984). "Structural Inorganic Chemistry". Oxford University Press.
  4. (1966). "Zur Struktur der A-Form der Sesquioxide der Seltenen Erden. II. Strukturuntersuchung an Nd2O3". [[Zeitschrift für anorganische und allgemeine Chemie.
  5. (1979). "Etude par diffraction neutronique des structures de haute temperature de La2O3 et Nd2O3". [[Materials Research Bulletin.
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neodymium(iii)-compounds sesquioxides
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