Scandium(III) sulfide

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Scandium(III) sulfide
Scandium(III) sulfide
Names
Other names
scandium sesquisulfide
Identifiers
3D model (
JSmol
)
ChemSpider
ECHA InfoCard
 100.032.097 Edit this at Wikidata
EC Number
  • 235-320-1
  • InChI=1S/3S.2Sc/q3*-2;2*+3
    Key: KAYAWNAUDDJSHN-UHFFFAOYSA-N
  • [S-2].[S-2].[S-2].[Sc+3].[Sc+3]
Properties
Sc2S3
Molar mass 186.11 g/mol
Appearance yellow crystals
Density 2.91 g/cm3, solid
Melting point 1,775 °C (3,227 °F; 2,048 K)
Structure
orthorhombic
Related compounds
Other anions
 Scandium oxide
Other cations
 Yttrium(III) sulfide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Scandium(III) sulfide is a chemical compound of scandium and sulfur with the chemical formula Sc2S3. It is a yellow solid.

Structure

The

cubic close packed array of anions. Whereas NaCl has all the octahedral interstices in the anion lattice occupied by cations, Sc2S3 has one third of them vacant. The vacancies are ordered, but in a very complicated pattern, leading to a large, orthorhombic unit cell belonging to the space group Fddd.[1]

Synthesis

chemical vapor transport at 950 °C using iodine as the transport agent.[1]

Sc2O3 + 3H2S → Sc2S3 + 3H2O

Scandium(III) sulfide can be prepared by reacting

scandium(III) chloride with dry hydrogen sulfide at elevated temperature:[2]

2 ScCl3 + 3 H2S → Sc2S3 + 6 HCl

Reactivity

Above 1100 °C, Sc2S3 loses sulfur, forming

nonstoichiometric compounds such as Sc1.37S2.[1]

References

  1. ^
    doi:10.1021/ic50019a004
    .
  2. doi:10.1002/zaac.19301900113
    .
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