REAu2In4 (RE = La, Ce, Pr, Nd): Polyindides from liquid indium

James R. Salvador, Khang Hoang, S. D. Mahanti, Mercouri G. Kanatzidis

Research output: Contribution to journalArticle

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Abstract

The series of compounds REAu2In4 (RE = La, Ce, Pr, Nd) crystallize from excess In as rod-shaped single crystals. All members adopt the orthorhombic space group Pnma with a = 18.506(2) Å, b = 4.6865(6) Å, and c = 7.3414(9) Å for LaAu2In4, a = 18.514(3) Å, b = 4.6624(8) Å, and c = 7.389(1) Å for CeAu 2In4, a = 18.420(4) Å, b = 4.6202(9) Å, and c = 7.376(2) Å for the Pr analogue, and a = 18.406(2) Å, b = 4.6114(5) Å, and c = 7.4073(7) Å for NdAu2In4. The REAu2In4 series can be regarded as polar intermetallic phases composed of a complex [Au2In4]3- polyanion network in which the rare-earth ions are embedded. The [Au 2In4]3- network features In tetramer units, which defines the compounds as polyindides. Magnetic measurements found no magnetic ordering down to 2 K for any of the compounds. In addition, LaAu 2In4 was found to be Pauli paramagnetic with a small susceptibility. Ab initio density functional methods were used to carry out electronic structure calculations to explore the bonding, the role of gold, and the contributions of different atoms to the density of states near the Fermi energy. We find that the density of states decreases slowly near Ef and reaches a minimum at about 0.5 eV above Ef.

Original languageEnglish
Pages (from-to)6933-6941
Number of pages9
JournalInorganic Chemistry
Volume46
Issue number17
DOIs
Publication statusPublished - Aug 20 2007

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Indium
Magnetic variables measurement
Fermi level
Gold
Rare earths
Intermetallics
Electronic structure
indium
Magnetization
Single crystals
Ions
Atoms
Liquids
liquids
magnetic measurement
intermetallics
rods
rare earth elements
analogs
gold

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

REAu2In4 (RE = La, Ce, Pr, Nd) : Polyindides from liquid indium. / Salvador, James R.; Hoang, Khang; Mahanti, S. D.; Kanatzidis, Mercouri G.

In: Inorganic Chemistry, Vol. 46, No. 17, 20.08.2007, p. 6933-6941.

Research output: Contribution to journalArticle

Salvador, James R. ; Hoang, Khang ; Mahanti, S. D. ; Kanatzidis, Mercouri G. / REAu2In4 (RE = La, Ce, Pr, Nd) : Polyindides from liquid indium. In: Inorganic Chemistry. 2007 ; Vol. 46, No. 17. pp. 6933-6941.
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title = "REAu2In4 (RE = La, Ce, Pr, Nd): Polyindides from liquid indium",
abstract = "The series of compounds REAu2In4 (RE = La, Ce, Pr, Nd) crystallize from excess In as rod-shaped single crystals. All members adopt the orthorhombic space group Pnma with a = 18.506(2) {\AA}, b = 4.6865(6) {\AA}, and c = 7.3414(9) {\AA} for LaAu2In4, a = 18.514(3) {\AA}, b = 4.6624(8) {\AA}, and c = 7.389(1) {\AA} for CeAu 2In4, a = 18.420(4) {\AA}, b = 4.6202(9) {\AA}, and c = 7.376(2) {\AA} for the Pr analogue, and a = 18.406(2) {\AA}, b = 4.6114(5) {\AA}, and c = 7.4073(7) {\AA} for NdAu2In4. The REAu2In4 series can be regarded as polar intermetallic phases composed of a complex [Au2In4]3- polyanion network in which the rare-earth ions are embedded. The [Au 2In4]3- network features In tetramer units, which defines the compounds as polyindides. Magnetic measurements found no magnetic ordering down to 2 K for any of the compounds. In addition, LaAu 2In4 was found to be Pauli paramagnetic with a small susceptibility. Ab initio density functional methods were used to carry out electronic structure calculations to explore the bonding, the role of gold, and the contributions of different atoms to the density of states near the Fermi energy. We find that the density of states decreases slowly near Ef and reaches a minimum at about 0.5 eV above Ef.",
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N2 - The series of compounds REAu2In4 (RE = La, Ce, Pr, Nd) crystallize from excess In as rod-shaped single crystals. All members adopt the orthorhombic space group Pnma with a = 18.506(2) Å, b = 4.6865(6) Å, and c = 7.3414(9) Å for LaAu2In4, a = 18.514(3) Å, b = 4.6624(8) Å, and c = 7.389(1) Å for CeAu 2In4, a = 18.420(4) Å, b = 4.6202(9) Å, and c = 7.376(2) Å for the Pr analogue, and a = 18.406(2) Å, b = 4.6114(5) Å, and c = 7.4073(7) Å for NdAu2In4. The REAu2In4 series can be regarded as polar intermetallic phases composed of a complex [Au2In4]3- polyanion network in which the rare-earth ions are embedded. The [Au 2In4]3- network features In tetramer units, which defines the compounds as polyindides. Magnetic measurements found no magnetic ordering down to 2 K for any of the compounds. In addition, LaAu 2In4 was found to be Pauli paramagnetic with a small susceptibility. Ab initio density functional methods were used to carry out electronic structure calculations to explore the bonding, the role of gold, and the contributions of different atoms to the density of states near the Fermi energy. We find that the density of states decreases slowly near Ef and reaches a minimum at about 0.5 eV above Ef.

AB - The series of compounds REAu2In4 (RE = La, Ce, Pr, Nd) crystallize from excess In as rod-shaped single crystals. All members adopt the orthorhombic space group Pnma with a = 18.506(2) Å, b = 4.6865(6) Å, and c = 7.3414(9) Å for LaAu2In4, a = 18.514(3) Å, b = 4.6624(8) Å, and c = 7.389(1) Å for CeAu 2In4, a = 18.420(4) Å, b = 4.6202(9) Å, and c = 7.376(2) Å for the Pr analogue, and a = 18.406(2) Å, b = 4.6114(5) Å, and c = 7.4073(7) Å for NdAu2In4. The REAu2In4 series can be regarded as polar intermetallic phases composed of a complex [Au2In4]3- polyanion network in which the rare-earth ions are embedded. The [Au 2In4]3- network features In tetramer units, which defines the compounds as polyindides. Magnetic measurements found no magnetic ordering down to 2 K for any of the compounds. In addition, LaAu 2In4 was found to be Pauli paramagnetic with a small susceptibility. Ab initio density functional methods were used to carry out electronic structure calculations to explore the bonding, the role of gold, and the contributions of different atoms to the density of states near the Fermi energy. We find that the density of states decreases slowly near Ef and reaches a minimum at about 0.5 eV above Ef.

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