RbAuUSe3, CsAuUSe3, RbAuUTe3, and CsAuUTe3: Syntheses and structure; magnetic properties of RbAuUSe3

Daniel E. Bugaris; James A. Ibers

doi:10.1016/j.jssc.2009.07.012

RbAuUSe₃, CsAuUSe₃, RbAuUTe₃, and CsAuUTe₃: Syntheses and structure; magnetic properties of RbAuUSe₃

Daniel E. Bugaris, James A. Ibers^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

The compounds RbAuUSe₃, CsAuUSe₃, and RbAuUTe₃ were synthesized at 1073 K from the reactions of U, Au, Q, and A₂Q₃ (A=Rb or Cs; Q=Se or Te). The compound CsAuUTe₃ was synthesized at 1173 K from the reaction of U, Au, Te, and CsCl as a flux. These isostructural compounds crystallize in the KCuZrS₃ structure type in space group Cmcm of the orthorhombic system. The structure consists of _∞² [AuU Q₃^-] layers that contain nearly regular UQ₆ octahedra and distorted AuQ₄ tetrahedra. The infinite layers are separated by bicapped trigonal prismatic A cations. The magnetic behavior of RbAuUSe₃ deviates significantly from Curie-Weiss behavior at low temperatures. For T>200 K, the values of the Curie constant C and the Weiss constant θ_p are 1.82(9) emu K mol^-1 and -3.5(2)×10² K, respectively. The effective magnetic moment μ_eff is 3.81(9) μ_B. Formal oxidation states of A/Au/U/Q may be assigned as +1/+1/+4/-2, respectively.

Original language	English (US)
Pages (from-to)	2587-2590
Number of pages	4
Journal	Journal of Solid State Chemistry
Volume	182
Issue number	9
DOIs	https://doi.org/10.1016/j.jssc.2009.07.012
State	Published - Sep 2009

Keywords

Crystal structure
Gold
Magnetism
Solid-state quaternary chalcogenide
Synthesis
Uranium

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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@article{e4d6ee2e21464ce8ba3e11a1da3d2f5a,

title = "RbAuUSe3, CsAuUSe3, RbAuUTe3, and CsAuUTe3: Syntheses and structure; magnetic properties of RbAuUSe3",

abstract = "The compounds RbAuUSe3, CsAuUSe3, and RbAuUTe3 were synthesized at 1073 K from the reactions of U, Au, Q, and A2Q3 (A=Rb or Cs; Q=Se or Te). The compound CsAuUTe3 was synthesized at 1173 K from the reaction of U, Au, Te, and CsCl as a flux. These isostructural compounds crystallize in the KCuZrS3 structure type in space group Cmcm of the orthorhombic system. The structure consists of ∞2 [AuU Q3-] layers that contain nearly regular UQ6 octahedra and distorted AuQ4 tetrahedra. The infinite layers are separated by bicapped trigonal prismatic A cations. The magnetic behavior of RbAuUSe3 deviates significantly from Curie-Weiss behavior at low temperatures. For T>200 K, the values of the Curie constant C and the Weiss constant θp are 1.82(9) emu K mol-1 and -3.5(2)×102 K, respectively. The effective magnetic moment μeff is 3.81(9) μB. Formal oxidation states of A/Au/U/Q may be assigned as +1/+1/+4/-2, respectively.",

keywords = "Crystal structure, Gold, Magnetism, Solid-state quaternary chalcogenide, Synthesis, Uranium",

author = "Bugaris, {Daniel E.} and Ibers, {James A.}",

note = "Funding Information: This research was supported by the US Department of Energy, Basic Energy Sciences Grant ER-15522. Magnetic measurements were made at the Materials Research Science and Engineering Center, Magnet and Low Temperature Facility, supported by the National Science Foundation (DMR05-20513). ",

year = "2009",

month = sep,

doi = "10.1016/j.jssc.2009.07.012",

language = "English (US)",

volume = "182",

pages = "2587--2590",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

number = "9",

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T1 - RbAuUSe3, CsAuUSe3, RbAuUTe3, and CsAuUTe3

T2 - Syntheses and structure; magnetic properties of RbAuUSe3

AU - Bugaris, Daniel E.

AU - Ibers, James A.

N1 - Funding Information: This research was supported by the US Department of Energy, Basic Energy Sciences Grant ER-15522. Magnetic measurements were made at the Materials Research Science and Engineering Center, Magnet and Low Temperature Facility, supported by the National Science Foundation (DMR05-20513).

PY - 2009/9

Y1 - 2009/9

N2 - The compounds RbAuUSe3, CsAuUSe3, and RbAuUTe3 were synthesized at 1073 K from the reactions of U, Au, Q, and A2Q3 (A=Rb or Cs; Q=Se or Te). The compound CsAuUTe3 was synthesized at 1173 K from the reaction of U, Au, Te, and CsCl as a flux. These isostructural compounds crystallize in the KCuZrS3 structure type in space group Cmcm of the orthorhombic system. The structure consists of ∞2 [AuU Q3-] layers that contain nearly regular UQ6 octahedra and distorted AuQ4 tetrahedra. The infinite layers are separated by bicapped trigonal prismatic A cations. The magnetic behavior of RbAuUSe3 deviates significantly from Curie-Weiss behavior at low temperatures. For T>200 K, the values of the Curie constant C and the Weiss constant θp are 1.82(9) emu K mol-1 and -3.5(2)×102 K, respectively. The effective magnetic moment μeff is 3.81(9) μB. Formal oxidation states of A/Au/U/Q may be assigned as +1/+1/+4/-2, respectively.

AB - The compounds RbAuUSe3, CsAuUSe3, and RbAuUTe3 were synthesized at 1073 K from the reactions of U, Au, Q, and A2Q3 (A=Rb or Cs; Q=Se or Te). The compound CsAuUTe3 was synthesized at 1173 K from the reaction of U, Au, Te, and CsCl as a flux. These isostructural compounds crystallize in the KCuZrS3 structure type in space group Cmcm of the orthorhombic system. The structure consists of ∞2 [AuU Q3-] layers that contain nearly regular UQ6 octahedra and distorted AuQ4 tetrahedra. The infinite layers are separated by bicapped trigonal prismatic A cations. The magnetic behavior of RbAuUSe3 deviates significantly from Curie-Weiss behavior at low temperatures. For T>200 K, the values of the Curie constant C and the Weiss constant θp are 1.82(9) emu K mol-1 and -3.5(2)×102 K, respectively. The effective magnetic moment μeff is 3.81(9) μB. Formal oxidation states of A/Au/U/Q may be assigned as +1/+1/+4/-2, respectively.

KW - Crystal structure

KW - Gold

KW - Magnetism

KW - Solid-state quaternary chalcogenide

KW - Synthesis

KW - Uranium

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JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

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