Neodymium tungstate

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 crystalsthat are slightly soluble in water.

Preperation

• Reacting neodymium(III) oxide and tungsten(VI) oxide would produce anhydrous neodymium tungstate:

${\mathsf {Nd_{2}O_{3}+3WO_{3}\ \xrightarrow {1000^{o}C} \ Nd_{2}(WO_{4})_{3}}}$

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

${\mathsf {3Na_{2}WO_{4}+2Nd(NO_{3})_{3}\ \xrightarrow {} \ Nd_{2}(WO_{4})_{3}\cdot 9H_{2}O\downarrow +6NaNO_{3}}}$

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 °. It is insoluble in ethanol and acetone and sparingly soluble in water. It forms the nonahydrate Nd₂(WO₄)₃·9H₂O.