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 language | English |
|---|---|
| Pages (from-to) | 7068-7070 |
| Number of pages | 3 |
| Journal | Inorganic Chemistry |
| Volume | 47 |
| Issue number | 16 |
| DOIs | |
| Publication status | Published - Aug 18 2008 |
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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 journal › Article
}
TY - JOUR
T1 - AEuAsS3 (A = Li, K, Rb, and Cs)
T2 - New As3+ species from an arsenic-rich polysulfide flux
AU - Bera, Tarun K.
AU - Kanatzidis, Mercouri G
PY - 2008/8/18
Y1 - 2008/8/18
N2 - 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.
AB - 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.
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U2 - 10.1021/ic801017h
DO - 10.1021/ic801017h
M3 - Article
VL - 47
SP - 7068
EP - 7070
JO - Inorganic Chemistry
JF - Inorganic Chemistry
SN - 0020-1669
IS - 16
ER -