    | |
| Names | |
|---|---|
| IUPAC names Dineodymium trisulfide | |
| Other names Neodymium sulfide | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.031.642 |
| EC Number |
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| Properties | |
| Nd2S3 | |
| Molar mass | 384.66 g·mol−1 |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Neodymium(III) sulfide is aninorganicchemical compound with the formula Nd2S3[2] composed of a twoneodymium atoms in the +3 oxidation state and threesulfur atoms in the −2 oxidation state. Like other rare earth sulfides, neodymium(III) sulfide is used as a high-performance inorganic pigment.[3]
Neodymium(III) sulfide can directly be produced by reacting neodymium with sulfur:[4]
Once prepared, neodymium(III) sulfide can be purified bychemical vapor transport usingiodine.[5]
It can also be produced by treatingneodymium oxide with hydrogen sulfide at 1450 °C:[4][6]
Neodymium(III) sulfide is (as γ-form) a light green solid. The compound comes in three forms.[3] The α-form has anorthorhombic crystal structure, the β form has atetragonal crystal structure, and the γ form has acubic 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 anelectrical insulator.[4]