PROFILPELAJAR.COM

Neodymium tungstate
Names
	Other names Neodymium(III) wolframate; Neodymi(III) tungstate; Neodymium wolframate
Identifiers
CAS Number	14014-27-8;
3D model (JSmol)	Interactive image;
ECHA InfoCard	100.034.376
EC Number	237-828-9;
PubChem CID	44148797;
	InChI InChI=1S/2Nd.12O.3W/q2+3;12-2;;; Key: GXEGJIVZLXITCF-UHFFFAOYSA-N;
	SMILES [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
Chemical formula	Nd2(WO4)3
Molar mass	1031,9968 g/mol (anhydrous); 1194,13432 g/mol (nonahydrate)
Appearance	light purple crystals
Density	7,02 g/cm3
Melting point	1,135 °C (2,075 °F; 1,408 K)
Solubility in water	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). Infobox references

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

The nonahydrate could be produced by the reaction of sodium tungstate and neodymium (III) nitrate:

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

^ ^a ^b Villars, Pierre; Cenzual, Karin; Gladyshevskii, Roman (2017-07-24). Handbook. Walter de Gruyter GmbH & Co KG. ISBN 978-3-11-043655-6.
^ 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.