Samarium(III) sulfide
| Names | |
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| Other names
disamarium trisulphide; Samarium sesquisulfide
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.031.875 |
| EC Number |
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PubChemCID
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CompTox Dashboard(EPA)
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| Properties | |
| Sm2S3 | |
| Molar mass | 396.915 g/mol |
| Appearance | red-brown crystals |
| Density | 5.87 g/cm3,solid |
| Melting point | 1,720 °C (3,130 °F; 1,990 K) |
| Band gap | 1.71 eV |
| +3300.0·10−6cm3/mol | |
| Structure | |
| orthorhombic | |
Except where otherwise noted, data are given for materials in theirstandard state(at 25 °C [77 °F], 100 kPa).
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Samarium(III) sulfide(Sm2S3) is achemical compoundof the rare earth elementsamarium,andsulfur.In this compound samarium is in the +3oxidation state,and sulfur is an anion in the −2 state.
Production
[edit]One way to make Samarium(III) sulfide is to heat samarium metal with sulfur. Another way to make a thin film is to alternatively soak insamarium(III) chloridetartaric acidcomplex, andsodium thiosulfate.[1]
Properties
[edit]The low temperature α form crystallises in theorthorhombic crystal system.The unit cell has dimensions a=7.376, b=3.9622 c=15.352 Å with volume 448.7 Å3.There are four of the formula in each unit cell (Sm8S12). The density comes out to 5.88 kg/liter. There are two kinds of samarium coordination in the solid, one is eight coordinated with sulfur surrounding in a bicappedtrigonal pyramid.The other is a sevenfold capped distorted octahedral arrangement. This structure is similar to other light rare-earth element sulfides.[2]
Samarium(III) sulfide is asemiconductorwith aband gapof 1.7 eV.[3]As a thin film on high area electrodes, it is under investigation as asuper capacitordielectric,withspecific capacitancesof up to 360Faradsper gram.[4]
Related
[edit]Related samarium sulfides include the monosulfide SmS and the mixed valent Sm3S4which are also semiconductors.[5]KSm2CuS6is a layered quaternary sulfide.[6]
References
[edit]- ^Kumbhar, V.S.; Jagadale, A.D.; Lokhande, C.D. (July 2013). "Supercapacitive evaluation of soft chemically deposited α-Sm2S3 thin films".Journal of Power Sources.234:107–110.doi:10.1016/j.jpowsour.2013.01.078.
- ^Aruga, Atsushi; Tsujimi, Sachiko; Nakai, Izumi (1996)."Crystal Structure of Samarium Sesquisulfide, α-Sm2S3".Analytical Sciences.12(1): 151–152.doi:10.2116/analsci.12.151.
- ^Marin, Chris M.; Wang, Lu; Brewer, Joseph R.; Mei, Wai-Ning; Cheung, Chin Li (June 2013). "Crystalline α-Sm2S3 nanowires: Structure and optical properties of an unusual intrinsically degenerate semiconductor".Journal of Alloys and Compounds.563:293–299.doi:10.1016/j.jallcom.2013.02.082.
- ^Ghogare, T.T.; Lokhande, V.C.; Ji, T.; Patil, U.M.; Lokhande, C.D. (June 2020). "A graphene oxide /samarium sulfide (GO/Sm2S3) composite thin film: Preparation and electrochemical study".Surfaces and Interfaces.19:100507.doi:10.1016/j.surfin.2020.100507.S2CID216370577.
- ^Wang, Lu; Marin, Chris; Mei, Wai-Ning; Cheung, Chin (31 May 2015)."Electronic structures of lanthanum, samarium, and gadolinium sulfides".AIMS Materials Science.2(2): 97–105.doi:10.3934/matersci.2015.2.97.
- ^Pomelova, Tatiana A.; Podlipskaya, Tatiana Yu.; Kuratieva, Natalia V.; Cherkov, Alexander G.; Nebogatikova, Nadezhda A.; Ryzhikov, Maxim R.; Huguenot, Arthur; Gautier, Régis; Naumov, Nikolay G. (2018-11-05)."Synthesis, Crystal Structure, and Liquid Exfoliation of Layered Lanthanide Sulfides KLn 2 CuS 6 (Ln = La, Ce, Pr, Nd, Sm)".Inorganic Chemistry.57(21): 13594–13605.doi:10.1021/acs.inorgchem.8b02213.ISSN0020-1669.PMID30354089.S2CID53026735.