Neodymium tungstate

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Neodymium tungstate
Names
Other names
Neodymium(III) wolframate
Neodymi(III) tungstate
Neodymium wolframate
Identifiers
3D model (JSmol)
ECHA InfoCard 100.034.376 Edit this at Wikidata
EC Number
  • 237-828-9
  • InChI=1S/2Nd.12O.3W/q2*+3;12*-2;;;
    Key: GXEGJIVZLXITCF-UHFFFAOYSA-N
  • [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Nd+3].[Nd+3].[W].[W].[W]
Properties
Nd2(WO4)3
Molar mass 1031,9968 g/mol (anhydrous)
1194,13432 g/mol (nonahydrate)
Appearance light purple crystals[1]
Density 7,02 g/cm3
Melting point 1,135 °C (2,075 °F; 1,408 K)
21 mg/100 mL (20 °C)
27 mg/100 mL (100 °C)
Related compounds
Other anions
Neodymium chromate
Neodymium molybdate
Other cations
Praseodymium tungstate
Promethium tungstate
Samarium tungstate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Neodymium tungstate is an inorganic compound, a salt of neodymium and tungstic acid with the chemical formula Nd2(WO4)3. It forms hydrated light purple crystals[1] that are slightly soluble in water.

Preparation

Reacting neodymium (III) oxide and tungsten (VI) oxide at 1000 °C would produce anhydrous neodymium tungstate:

Nd2O3 + 3 WO3 → Nd2(WO4)3
3 Na2WO4 + 2 Nd(NO3)3 → Nd2(WO4)3·9H2O↓ + 6 NaNO3

Properties

Neodymium tungstate forms the crystal of a monoclinic crystal system, with space group A 2/a, lattice constants a = 1.151 nm, b = 1.159 nm, c = 0.775 nm and β = 109.67 °.[2] It is insoluble in ethanol and acetone and sparingly soluble in water. It forms the nonahydrate Nd2(WO4)3·9H2O.

References

  1. ^ a b Villars, Pierre; Cenzual, Karin; Gladyshevskii, Roman (2017-07-24). Handbook. Walter de Gruyter GmbH & Co KG. ISBN 978-3-11-043655-6.
  2. ^ O. Madelung; U. Rössler; M. Schulz (2000). Ternary Compounds, Organic Semiconductors. Vol. 41E. Landolt-Börnstein. pp. 1–5. doi:10.1007/10717201_1245. ISBN 978-3-540-66781-0.