Neodymium tungstate
Appearance
Names | |
---|---|
Other names
Neodymium(III) wolframate
Neodymi(III) tungstate Neodymium wolframate | |
Identifiers | |
3D model (JSmol)
|
|
ECHA InfoCard | 100.034.376 |
EC Number |
|
PubChem CID
|
|
| |
| |
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
- 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.