Samarium(III) sulfide

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Samarium(III) sulfide
Names
Other names
disamarium trisulphide; Samarium sesquisulfide
Identifiers
3D model (
JSmol
)
ChemSpider
ECHA InfoCard
 100.031.875 Edit this at Wikidata
EC Number
  • 235-076-6
  • InChI=1S/3S.2Sm/q3*-2;2*+3
  • [S-2].[S-2].[S-2].[Sm+3].[Sm+3]
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
+3300.0·10−6 cm3/mol
Structure
orthorhombic
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Samarium(III) sulfide (Sm2S3) is a chemical compound of the rare earth element samarium, and sulfur. In this compound samarium is in the +3 oxidation state, and sulfur is an anion in the −2 state.

Production

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 in samarium(III) chloride tartaric acid complex, and sodium thiosulfate.[1]

Properties

The low temperature α form crystallises in the

trigonal 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 a

super capacitor dielectric, with specific capacitances of up to 360 Farads per gram.[4]

Related

Related samarium sulfides include the monosulfide SmS and the mixed valent Sm3S4 which are also semiconductors.[5] KSm2CuS6 is a layered quaternary sulfide.[6]

References

  1. doi:10.1016/j.jpowsour.2013.01.078
    .
  2. doi:10.2116/analsci.12.151
    .
  3. doi:10.1016/j.jallcom.2013.02.082
    .
  4. S2CID 216370577
    .
  5. doi:10.3934/matersci.2015.2.97
    .
  6. S2CID 53026735
    .
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