Samarium monosulfide
{{Chembox
| Name = Samarium monosulfide
| ImageFile = NaCl bonds.svg
| ImageCaption =
| IUPACName =
| OtherNames =
| Section1 = {{Chembox Identifiers
| CASNo =
| PubChem =
| ChemSpiderID =
| EINECS =
| DTXSID =
| StdInChI=1S/S.Sm/q-2;+2
| StdInChIKey = KASDAGLLEDDKAA-UHFFFAOYSA-N
| SMILES = [S-2].[Sm+2]
}}
| Section2 = {{Chembox Properties
|Sm=1| S=1
| Appearance = dark brown crystals
| Density =
| Solubility =
| MeltingPtC = 1940
| BoilingPtC =
}}
| Section4 = {{Chembox Structure
| CrystalStruct = cubic
}}
| Section7 = {{Chembox Hazards
| MainHazards =
}}
| Section6 = {{Chembox Related
| OtherCations = Neodymium sulfide
}}
}}
Samarium monosulfide is a binary inorganic chemical compound of samarium metal and sulfur with the chemical formula {{chem2|SmS}}.{{cite book |title=Comprehensive Inorganic Chemistry II: From Elements to Applications |date=23 July 2013 |publisher=Newnes |isbn=978-0-08-096529-1 |page=537 |url=https://books.google.com/books?id=_4C7oid1kQQC&dq=samarium+monosulfide+SmS&pg=RA1-PA537 |access-date=25 July 2024 |language=en}}
Synthesis
Fusion of stoichiometric amounts of pure substances:
::{{chem2|Sm + S -> SmS}}
Physical properties
Samarium monosulfide forms crystals of cubic system, spatial group Fm3m, cell parameters a = 0.5970–0.5863 nm, Z = 4, structurally isomorphic with NaCl.{{cite journal |last1=Okamoto |first1=H. |title=S-Sm (Sulfur-Samarium) |journal=Journal of Phase Equilibria and Diffusion |date=1 December 2010 |volume=31 |issue=6 |pages=577 |doi=10.1007/s11669-010-9790-9 |bibcode=2010JPED...31..577O |url=https://link.springer.com/article/10.1007/s11669-010-9790-9 |access-date=25 July 2024 |language=en |issn=1863-7345}}
The compound melts congruently at a temperature of 1500 °C, 1940 °C, or 2080 °C.{{cite journal |last1=Predel |first1=B. |title=S-Sm (Sulfur-Samarium) |journal=Pu-Re – Zn-Zr |series=Landolt-Börnstein - Group IV Physical Chemistry |date=1998 |volume=5 J |pages=1–2 |doi=10.1007/10551312_2657 |isbn=3-540-61742-6 |url=https://materials.springer.com/lb/docs/sm_lbs_978-3-540-70705-9_2657 |access-date=25 July 2024 |language=en|url-access=subscription }}
SmS is a chalcogenide material that exists in two possible states: as a metal (also called "golden") and as a semiconductor ("blue" or "black").{{cite journal |last1=Volchkov |first1=Ivan |last2=Baskakov |first2=Evgeniy |last3=Strelov |first3=Vladimir |last4=Kanevskii |first4=Vladimir |title=Thermoelectric and electrical characteristics of SmS ceramic samples after exposure to a pulsed magnetic field |journal=Journal of Rare Earths |date=1 November 2022 |volume=40 |issue=11 |pages=1778–1784 |doi=10.1016/j.jre.2022.01.008 |bibcode=2022JREar..40.1778V |url=https://www.sciencedirect.com/science/article/abs/pii/S1002072122000084#:~:text=Samarium%20monosulfide%20(SmS)%20is%20a%20chalcogenide%20material%20that%20exists%20in,the%20conduction%20band%20is%20reached. |access-date=25 July 2024 |issn=1002-0721|url-access=subscription }} As a result, SmS has gained considerable interest as a switchable material.{{cite journal |last1=Sousanis |first1=Andreas |last2=Smet |first2=Philippe F. |last3=Poelman |first3=Dirk |title=Samarium Monosulfide (SmS): Reviewing Properties and Applications |journal=Materials |date=16 August 2017 |volume=10 |issue=8 |pages=953 |doi=10.3390/ma10080953 |doi-access=free |pmid=28813006 |pmc=5578319 |bibcode=2017Mate...10..953S |issn=1996-1944}}
Uses
Samarium monosulfide has a high sensitivity to deformation. Therefore, SmS is a promising material for creating pressure sensors of force, torque, accelerations, etc.{{cite journal |last1=BOLSHEV |first1=K. N. |title=Application of barorezistor from samarium monosulfide when carrying out heatphysical experiments |journal=ВЕСТНИК МАХ |date=2014 |issue=3 |url=https://vestnikmax.ifmo.ru/file/article/12166.pdf |access-date=26 July 2024}}
References
{{Reflist}}
{{Samarium compounds}}
{{sulfides}}