Neodymium(III) sulfide
Compound of neodymium and sulfur
From Wikipedia, the free encyclopedia
Neodymium(III) sulfide is an inorganic chemical compound with the formula Nd2S3[2] composed of a two neodymium atoms in the +3 oxidation state and three sulfur atoms in the −2 oxidation state. Like other rare earth sulfides, neodymium(III) sulfide is used as a high-performance inorganic pigment.[3]
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| Names | |
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| IUPAC names
Dineodymium trisulfide | |
| Other names
Neodymium sulfide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.031.642 |
| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| Nd2S3 | |
| Molar mass | 384.66 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation
Neodymium(III) sulfide can directly be produced by reacting neodymium with sulfur:[4]
- 2Nd + 3S → Nd2S3
Once prepared, neodymium(III) sulfide can be purified by chemical vapor transport using iodine.[5]
It can also be produced by treating neodymium oxide with hydrogen sulfide at 1450 °C:[4][6]
- Nd2O3 + 3 H2S → Nd2S3 + 3 H2O
Properties
Neodymium(III) sulfide is (as γ-form) a light green solid. The compound comes in three forms.[3] The α-form has an orthorhombic crystal structure, the β form has a tetragonal crystal structure, and the γ form has a cubic crystal structure. At 1650 °C in a vacuum, the γ compound decomposes to form neodymium monosulfide.[6]
Neodymium(III) sulfide has a high melting point and a lot of polymorphic forms which make it difficult to grow.[2] When heated, neodymium sulfide can lose sulfur atoms and can form a range of compositions between Nd2S3 and Nd3S4. Neodymium(III) sulfide is an electrical insulator.[4]