AEuAsS3 (A = Li, K, Rb, and Cs): New As3+ species from an arsenic-rich polysulfide flux

Tarun K. Bera, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Four europium compounds, LiEuAsS3 (I), KEuAsS3 (IIa), RbEuAsS3 (IIb), and CsEuAsS3 (IIc), containing As 3+ were synthesized in molten alkali-metal polysulfide salts. An As-rich flux was found to be necessary to stabilize the pyramidal building unit [AsS3]3-. All crystallize in the monoclinic space group P21/c with two new structure types. Compound I features a new coordination mode for the [AsS3]3- unit and three-dimensional [Eu(AsS3)]- framework. Compounds IIa-c are isostructural and feature a layer of [Eu(AsS3)]- with an unusual μ5-sulfide anion in a umbrella-like geometry. The compounds are paramagnetic semiconductors with an energy gap of ∼2.0 eV.

Original languageEnglish
Pages (from-to)7068-7070
Number of pages3
JournalInorganic Chemistry
Volume47
Issue number16
DOIs
Publication statusPublished - Aug 18 2008

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Europium compounds
europium compounds
Alkali Metals
polysulfides
Arsenic
Sulfides
arsenic
alkali metals
Anions
Molten materials
sulfides
Energy gap
Salts
Semiconductor materials
Fluxes
anions
salts
Geometry
geometry
polysulfide

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

AEuAsS3 (A = Li, K, Rb, and Cs) : New As3+ species from an arsenic-rich polysulfide flux. / Bera, Tarun K.; Kanatzidis, Mercouri G.

In: Inorganic Chemistry, Vol. 47, No. 16, 18.08.2008, p. 7068-7070.

Research output: Contribution to journalArticle

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