Neodymium(III) sulfate
sulfat.JPG) Neodymium sulfate crystals
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| Names | |
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| IUPAC name
Neodymium(III) trisulfate
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Other names
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.030.225 |
| EC Number |
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PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| Nd2(SO4)3 | |
| Molar mass | 576.7 g/mol |
| Appearance | Pink crystals |
| Density | 2.85 g/cm3 |
| Melting point | 700 °C (1,292 °F; 973 K) |
| 8 g/100 ml (20 °C) | |
| Solubility | Soluble in sulfuric acid |
| Structure[2] | |
| Monoclinic | |
| C2/c | |
a = 13.76 Å, b = 7.20 Å, c = 18.65 Å
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| Explosive data | |
| Shock sensitivity | Not explosive |
| Friction sensitivity | Not explosive |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards
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Irritant |
| GHS labelling: | |
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| H315, H319, H335 | |
| P261, P280, P304, P305+P351+P338, P340, P405, P501 | |
| NFPA 704 (fire diamond) | |
| Flash point | Not flammable |
| Not flammable | |
| Related compounds | |
Other anions
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Neodymium nitrate |
Other cations
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Praseodymium(III) sulfate |
Related compounds
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Neodymium sulfate octahydrate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Neodymium(III) sulfate is a salt of the rare-earth metal neodymium that has the formula Nd2(SO4)3. It forms multiple hydrates, the octa-, penta-, and the dihydrate, which the octahydrate is the most common. This compound has a retrograde solubility, unlike other compounds, its solubility decreases with increasing temperature.[3] This compound is used in glass for extremely powerful lasers.
Preparation
[edit]Neodymium sulfate is produced by dissolving neodymium(III) oxide in sulfuric acid:
- Nd2O3 + 3 H2SO4 → Nd2(SO4)3 + 3 H2O
It can also be prepared by the reaction of neodymium(III) perchlorate and sodium sulfate.
Properties
[edit]Neodymium sulfate octahydrate decomposes at 40 °C to the pentahydrate, which in turn decomposes to the dihydrate at 145 °C. The dihydrate dehydrates to the anhydrous form at 290 °C.[4]
References
[edit]- ^ "Neodymium Sulfate | 13477-91-3".
- ^ Donald R. Fitzwater; R. E. Rundle (1952). Structure of Neodymium Sulfate Octahydrate. University of Minnesota: Ames Laboratory, Iowa State College.
- ^ Art. A. Migdisov; V. V. Reukov; A. E. Williams-Jones (2005). "A spectrophotometric study of neodymium(III) complexation in sulfate solutions at elevated temperatures". Geochimica et Cosmochimica Acta. 70 (4): 983–992. doi:10.1016/j.gca.2005.11.001.
- ^ Wendlandt, W W (1958). "The thermal decomposition of yttrium and the rare earth metal sulphate hydrates". J. Inorg. & Nuclear Chem. 7 (1–2): 51–54. doi:10.1016/0022-1902(58)80026-3.