REMGa3Ge and RE3Ni3Ga8Ge 3 (M = Ni, Co; RE = rare-earth element)

New intermetallics synthesized in liquid gallium. X-ray, electron, and neutron structure determination and magnetism

Marina A. Zhuravleva, Robert J. Pcionek, Xiaoping Wang, Arthur J. Schultz, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

New quaternary intermetallic phases REMGa3Ge (1) (RE = Y, Sm, Tb, Gd, Er, Tm; M = Ni, Co) and RE3Ni3Ga 8Ge3 (2) (RE = Sm, Gd) were obtained from exploratory reactions involving rare-earth elements (RE), transition metal (M), Ge, and excess liquid Ga the reactive solvent. The crystal structures were solved with single-crystal X-ray and electron diffraction. The crystals of 1 and 2 are tetragonal. Single-crystal X-ray data: YNiGa3Ge, a = 4.1748(10) Å, c = 23.710(8) Å, V = 413.24(2) Å3, 14/mmm, Z = 4; Gd3Ni3Ga8Ge3, a = 4.1809(18) Å, c = 17.035(11) Å, V = 297.8(3) Aring;3, P4/mmm, Z = 1. Both compounds feature square nets of Ga atoms. The distribution of Ga and Ge atoms in the REMGa3Ge was determined with neutron diffraction. The neutron experiments revealed that in 1 the Ge atoms are specifically located at the 4e crystallographic site, while Ga atoms are at 4d and 8g. The crystal structures of these compounds are related and could be derived from the consecutive stacking of disordered [MGa]2 puckered layers, monatomic RE-Ge planes and [MGa4Ge2] slabs. Complex superstructures with modulations occurring in the ab-plane and believed to be associated with the square nets of Ga atoms were found by electron diffraction. The magnetic measurements show antiferromagnetic ordering of the moments located on the RE atoms at low temperature, and Curie-Weiss behavior at higher temperatures with the values of μeff close to those expected for RE3+ free ions.

Original languageEnglish
Pages (from-to)6412-6424
Number of pages13
JournalInorganic Chemistry
Volume42
Issue number20
DOIs
Publication statusPublished - Oct 6 2003

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Gallium
Magnetism
Rare earth elements
Intermetallics
gallium
intermetallics
Neutrons
rare earth elements
neutrons
X rays
Atoms
Electrons
Liquids
liquids
atoms
electrons
x rays
Electron diffraction
electron diffraction
Crystal structure

ASJC Scopus subject areas

  • Inorganic Chemistry

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REMGa3Ge and RE3Ni3Ga8Ge 3 (M = Ni, Co; RE = rare-earth element) : New intermetallics synthesized in liquid gallium. X-ray, electron, and neutron structure determination and magnetism. / Zhuravleva, Marina A.; Pcionek, Robert J.; Wang, Xiaoping; Schultz, Arthur J.; Kanatzidis, Mercouri G.

In: Inorganic Chemistry, Vol. 42, No. 20, 06.10.2003, p. 6412-6424.

Research output: Contribution to journalArticle

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title = "REMGa3Ge and RE3Ni3Ga8Ge 3 (M = Ni, Co; RE = rare-earth element): New intermetallics synthesized in liquid gallium. X-ray, electron, and neutron structure determination and magnetism",
abstract = "New quaternary intermetallic phases REMGa3Ge (1) (RE = Y, Sm, Tb, Gd, Er, Tm; M = Ni, Co) and RE3Ni3Ga 8Ge3 (2) (RE = Sm, Gd) were obtained from exploratory reactions involving rare-earth elements (RE), transition metal (M), Ge, and excess liquid Ga the reactive solvent. The crystal structures were solved with single-crystal X-ray and electron diffraction. The crystals of 1 and 2 are tetragonal. Single-crystal X-ray data: YNiGa3Ge, a = 4.1748(10) {\AA}, c = 23.710(8) {\AA}, V = 413.24(2) {\AA}3, 14/mmm, Z = 4; Gd3Ni3Ga8Ge3, a = 4.1809(18) {\AA}, c = 17.035(11) {\AA}, V = 297.8(3) Aring;3, P4/mmm, Z = 1. Both compounds feature square nets of Ga atoms. The distribution of Ga and Ge atoms in the REMGa3Ge was determined with neutron diffraction. The neutron experiments revealed that in 1 the Ge atoms are specifically located at the 4e crystallographic site, while Ga atoms are at 4d and 8g. The crystal structures of these compounds are related and could be derived from the consecutive stacking of disordered [MGa]2 puckered layers, monatomic RE-Ge planes and [MGa4Ge2] slabs. Complex superstructures with modulations occurring in the ab-plane and believed to be associated with the square nets of Ga atoms were found by electron diffraction. The magnetic measurements show antiferromagnetic ordering of the moments located on the RE atoms at low temperature, and Curie-Weiss behavior at higher temperatures with the values of μeff close to those expected for RE3+ free ions.",
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T1 - REMGa3Ge and RE3Ni3Ga8Ge 3 (M = Ni, Co; RE = rare-earth element)

T2 - New intermetallics synthesized in liquid gallium. X-ray, electron, and neutron structure determination and magnetism

AU - Zhuravleva, Marina A.

AU - Pcionek, Robert J.

AU - Wang, Xiaoping

AU - Schultz, Arthur J.

AU - Kanatzidis, Mercouri G

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N2 - New quaternary intermetallic phases REMGa3Ge (1) (RE = Y, Sm, Tb, Gd, Er, Tm; M = Ni, Co) and RE3Ni3Ga 8Ge3 (2) (RE = Sm, Gd) were obtained from exploratory reactions involving rare-earth elements (RE), transition metal (M), Ge, and excess liquid Ga the reactive solvent. The crystal structures were solved with single-crystal X-ray and electron diffraction. The crystals of 1 and 2 are tetragonal. Single-crystal X-ray data: YNiGa3Ge, a = 4.1748(10) Å, c = 23.710(8) Å, V = 413.24(2) Å3, 14/mmm, Z = 4; Gd3Ni3Ga8Ge3, a = 4.1809(18) Å, c = 17.035(11) Å, V = 297.8(3) Aring;3, P4/mmm, Z = 1. Both compounds feature square nets of Ga atoms. The distribution of Ga and Ge atoms in the REMGa3Ge was determined with neutron diffraction. The neutron experiments revealed that in 1 the Ge atoms are specifically located at the 4e crystallographic site, while Ga atoms are at 4d and 8g. The crystal structures of these compounds are related and could be derived from the consecutive stacking of disordered [MGa]2 puckered layers, monatomic RE-Ge planes and [MGa4Ge2] slabs. Complex superstructures with modulations occurring in the ab-plane and believed to be associated with the square nets of Ga atoms were found by electron diffraction. The magnetic measurements show antiferromagnetic ordering of the moments located on the RE atoms at low temperature, and Curie-Weiss behavior at higher temperatures with the values of μeff close to those expected for RE3+ free ions.

AB - New quaternary intermetallic phases REMGa3Ge (1) (RE = Y, Sm, Tb, Gd, Er, Tm; M = Ni, Co) and RE3Ni3Ga 8Ge3 (2) (RE = Sm, Gd) were obtained from exploratory reactions involving rare-earth elements (RE), transition metal (M), Ge, and excess liquid Ga the reactive solvent. The crystal structures were solved with single-crystal X-ray and electron diffraction. The crystals of 1 and 2 are tetragonal. Single-crystal X-ray data: YNiGa3Ge, a = 4.1748(10) Å, c = 23.710(8) Å, V = 413.24(2) Å3, 14/mmm, Z = 4; Gd3Ni3Ga8Ge3, a = 4.1809(18) Å, c = 17.035(11) Å, V = 297.8(3) Aring;3, P4/mmm, Z = 1. Both compounds feature square nets of Ga atoms. The distribution of Ga and Ge atoms in the REMGa3Ge was determined with neutron diffraction. The neutron experiments revealed that in 1 the Ge atoms are specifically located at the 4e crystallographic site, while Ga atoms are at 4d and 8g. The crystal structures of these compounds are related and could be derived from the consecutive stacking of disordered [MGa]2 puckered layers, monatomic RE-Ge planes and [MGa4Ge2] slabs. Complex superstructures with modulations occurring in the ab-plane and believed to be associated with the square nets of Ga atoms were found by electron diffraction. The magnetic measurements show antiferromagnetic ordering of the moments located on the RE atoms at low temperature, and Curie-Weiss behavior at higher temperatures with the values of μeff close to those expected for RE3+ free ions.

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