Neodymium(III) sulfide

Neodymium(III) sulfide is a 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]

Neodymium(III) sulfide

Names
IUPAC names Dineodymium trisulfide
Other names Neodymium sulfide
Identifiers
CAS Number	12035-32-4
3D model (JSmol)	Interactive image
ChemSpider	145460
ECHA InfoCard	100.031.642
EC Number	234-820-7
PubChem CID	166011
CompTox Dashboard (EPA)	DTXSID2093958
InChI InChI=1S/2Nd.3S/q2*+3;3*-2[1] Key: XZIGKOYGIHSSCQ-UHFFFAOYSA-N
SMILES [S-2].[S-2].[S-2].[Nd+3].[Nd+3]
Properties
Chemical formula	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). Infobox references

Preparation

Neodymium(III) sulfide can directly be produced by reacting neodymium with sulfur:^[4][5]

2Nd + 3S → Nd₂S₃

It can also be produced by sulfidizing neodymium oxide with H₂S 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]

See also

• Neodymium
• Sulfur
• Lanthanide

References

1. "Neodymium sulfide (Nd2S3)". pubchem.ncbi.nlm.nih.gov. Retrieved 11 April 2022.
2. Uspenskaya, S. I.; Eliseev, A. A.; Fedorov, A. A. (1975), Sheftal’, N. N.; Givargizov, E. I. (eds.), "Vapor Growth of Lanthanum and Neodymium Sulfide Crystals", РОСТ КРИСТАЛЛОВ/Rost Kristallov/Growth of Crystals, Boston, MA: Springer New York, pp. 257–260, doi:10.1007/978-1-4684-1689-3_55, ISBN 978-1-4684-1691-6, retrieved 2023-04-22
3. Faulkner, Edwin B.; Schwartz, Russell J. (2009-03-09). High Performance Pigments. John Wiley & Sons. ISBN 978-3-527-62692-2.
4. Cotton, Simon (2006). Lanthanide and Actinide Chemistry. John Wiley & Sons Ltd.
5. A. W. Sleight and D. P. Kelly (1973), Aaron Wold and John K. Ruff (ed.), Rare-earth sesquisulfides, Ln₂S₃, Inorganic Syntheses (in German), vol. 14, McGraw-Hill Book Company, Inc., pp. 152–155
6. Meyer, G.; Morss, Lester R. (1990-12-31). Synthesis of Lanthanide and Actinide Compounds. Springer Science & Business Media. ISBN 978-0-7923-1018-1.