Neodymium (III) sulfide

General
Surname	Neodymium (III) sulfide
other names	Dineodymium trisulfide
Molecular formula	Nd 2 S 3
Brief description	light green solid
External identifiers / databases
EC number	234-820-7
ECHA InfoCard	100,031,642
PubChem	166011
ChemSpider	145460
Wikidata	Q18212129
properties
Molar mass	384.68 g mol −1
Physical state	firmly
density	5.46 g cm −3
Melting point	2207 ° C
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Neodymium (III) sulfide is an inorganic chemical compound from the group of sulfides .

Extraction and presentation

Neodymium (III) sulfide can be obtained by reacting neodymium (III) oxide with hydrogen sulfide at 1450 ° C.

{\ displaystyle {\ ce {Nd2O3 + 3 H2S -> Nd2S3 + 3 H2O}}}

It is also possible to display it by reacting elementary neodymium with sulfur in an evacuated glass tube which is placed in a 2-zone furnace. The zone temperatures are 400 ° C and 100 ° C. After all the sulfur has reacted, the ampoule is tempered at 1000 ° C and the compound is obtained in polycrystalline form:

{\ displaystyle {\ ce {2 Nd + 3 S -> Nd2S3}}}

Rod-shaped single crystals up to 1 cm long can be obtained by modifying the synthesis from the elements. In addition to neodymium and sulfur, elemental iodine is added to the ampoule to be evacuated. In the 2-zone furnace, the primary product is now produced . If the compound obtained is heated in the ampoule to 1100 to 1200 ° C and held there for at least 20 hours, the compound decomposes and neodymium (III) sulfide single crystals grow in a melt of neodymium (III) iodide . After opening the ampoule, adhering iodide to the single crystals can be rinsed off with water or a water-ethanol mixture: ${\ displaystyle {\ ce {NdSI}}}$

{\ displaystyle {\ ce {6 Nd + 6 S + 3 I2 -> 6 NdSI}}}

{\ displaystyle {\ ce {3 NdSI -> Nd2S3 + NdI3}}}

properties

Neodymium (III) sulfide is a light green solid (as a γ modification). The compound comes in three modifications. The α-form has an orthorhombic , the β-form a tetragonal and the γ-form a cubic crystal structure . At 1650 ° C in a vacuum, the γ-compound decomposes, whereby the monosulfide is formed.

use

Like other rare earth sulfides, neodymium (III) sulfide is used as an inorganic high-performance pigment .

Individual evidence

^ ^A ^b ^c ^d Edwin B. Faulkner, Russell J. Schwartz: High Performance Pigments . John Wiley & Sons, 2009, ISBN 3-527-62692-1 , pp. 28 ( limited preview in Google Book search).
↑ ^a ^b David R. Lide: CRC Handbook of Chemistry and Physics, 84th Edition . CRC Press, 2004, ISBN 0-8493-0484-9 , pp. 4-84 .
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
↑ ^a ^b G. Meyer, Lester R. Morss (eds.): Synthesis of Lanthanide and Actinide Compounds . Springer, 1991, ISBN 0-7923-1018-7 , pp. 329–335 ( limited preview in Google Book search).
^ ^A ^b A. W. Sleight and DP Kelly: Rare-earth sesquisulfides, Ln ₂ S ₃ . In: Aaron Wold and John K. Ruff (Eds.): Inorganic Syntheses . tape 14 . McGraw-Hill Book Company, Inc., 1973, ISBN 07-071320-0 ( defective ) , p. 152-155 (English).

[HPP-1] A ^b ^c ^d Edwin B. Faulkner, Russell J. Schwartz: High Performance Pigments . John Wiley & Sons, 2009, ISBN 3-527-62692-1 , pp. 28 ( limited preview in Google Book search).

[CRC-2] David R. Lide: CRC Handbook of Chemistry and Physics, 84th Edition . CRC Press, 2004, ISBN 0-8493-0484-9 , pp. 4-84 .

[NV-3] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[Meyer-4] G. Meyer, Lester R. Morss (eds.): Synthesis of Lanthanide and Actinide Compounds . Springer, 1991, ISBN 0-7923-1018-7 , pp. 329–335 ( limited preview in Google Book search).

[IS14-5] A ^b A. W. Sleight and DP Kelly: Rare-earth sesquisulfides, Ln ₂ S ₃ . In: Aaron Wold and John K. Ruff (Eds.): Inorganic Syntheses . tape 14 . McGraw-Hill Book Company, Inc., 1973, ISBN 07-071320-0 ( defective ) , p. 152-155 (English).