Holmium (III) sulfide

General
Surname	Holmium (III) sulfide
other names	Holmium sulfide; Diholmium trisulfide;
Molecular formula	Ho 2 S 3
Brief description	yellow-orange solid
External identifiers / databases
EC number	235-302-3
ECHA InfoCard	100.032.081
PubChem	166640
ChemSpider	145818
Wikidata	Q15628254
properties
Molar mass	426.06 g mol −1
Physical state	firmly
density	5.92 g cm −3
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 .

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

Extraction and presentation

Holmium (III) sulfide can be obtained by reacting holmium (III) oxide with hydrogen sulfide at 1325 ° C.

{\ displaystyle {\ ce {Ho2O3 + 3 H2S -> Ho2S3 + 3 H2O}}}

It is also possible to display it by reacting elementary holmium 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 Ho + 3 S -> Ho2S3}}}

Rod-shaped single crystals up to 1 cm long can be obtained by modifying the synthesis from the elements. In addition to holmium 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 holmium (III) sulfide single crystals grow in a melt of holmium (III) iodide : ${\ displaystyle {\ ce {HoSI}}}$

{\ displaystyle {\ ce {6 Ho + 6 S + 3 I2 -> 6 HoSI}}}

{\ displaystyle {\ ce {3 HoSI -> Ho2S3 + HoI3}}}

properties

Holmium (III) sulfide is a yellowish to orange solid and crystallizes in the monoclinic crystal system with the space group P 2 ₁ / m (space group no. 11) . There are also high-pressure modifications with a cubic and orthorhombic structure. Template: room group / 11

use

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

Individual evidence

↑ ^a ^b ^c ^d David R. Lide: CRC Handbook of Chemistry and Physics, 84th Edition . CRC Press, 2004, ISBN 0-8493-0484-9 , pp. 4-60 .
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
↑ G. Meyer, Lester R. Morss (Ed.): 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).
↑ Ho2S3: crystal structure, physical properties
^ E. Yu Tonkov: Compounds and Alloys Under High Pressure A Handbook . CRC Press, 1998, ISBN 978-90-5699-047-3 , pp. 272 ( limited preview in Google Book search).
^ 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-1] David R. Lide: CRC Handbook of Chemistry and Physics, 84th Edition . CRC Press, 2004, ISBN 0-8493-0484-9 , pp. 4-60 .

[NV-2] 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-3] G. Meyer, Lester R. Morss (Ed.): Synthesis of Lanthanide and Actinide Compounds . Springer, 1991, ISBN 0-7923-1018-7 , pp. 329–335 ( limited preview in Google Book search).

[IS14-4] 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).

[5] Ho2S3: crystal structure, physical properties

[E._Yu_Tonkov-6] E. Yu Tonkov: Compounds and Alloys Under High Pressure A Handbook . CRC Press, 1998, ISBN 978-90-5699-047-3 , pp. 272 ( limited preview in Google Book search).

[HPP-7] 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).