Rare earth metal rich magnesium compounds RE4NiMg (RE=Y, Pr–Nd, Sm, Gd–Tm, Lu)—Synthesis, structure, and hydrogenation behavior

Tuncel, Selcan; Roquefere, Jean‐Gabriel; Stan, Cristina; Bobet, Jean-Louis; Chevalier, Bernard; Gaudin, Etienne; Hoffmann, Rolf‐Dieter; Rodewald, Ute Ch.; Pöttgen, Rainer

doi:10.1016/j.jssc.2008.10.026

Cited by 42 publications

(26 citation statements)

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“…In recent years we synthesized a family of RE 4 T Mg and RE 4 T Cd compounds (RE = rare earth element; T = late transition metal) [1, 2, and refs. therein] with the cubic Gd 4 RhIn-type structure [3].…”

Section: Introductionmentioning

confidence: 99%

“…therein] with the cubic Gd 4 RhIn-type structure [3]. These rare earth metal-rich compounds have three crystallographically independent rare earth sites, and the structures contain the rare motif of Mg 4 and Cd 4 tetrahedra. Besides their crystal chemical peculiarities, we were also interested in the physical and chemical properties of these materials.…”

Section: Introductionmentioning

confidence: 99%

“…Besides their crystal chemical peculiarities, we were also interested in the physical and chemical properties of these materials. An interesting example is Gd 4 NiMg [4] which orders antiferromagnetically at T N = 92 K. Gd 4 NiMg absorbs up to 11 hydrogen atoms per formula unit and the resulting hydride Gd 4 NiMgH 11 remains paramagnetic down to 1.8 K.…”

Section: Introductionmentioning

confidence: 99%

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Drastic Decrease of the Curie Temperature in the Solid Solution GdRu_xCd_1–x

Tappe

Schappacher

Hermes

et al. 2009

Zeitschrift Für Naturforschung B

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Five samples of solid solutions GdRu x Cd 1−x extending up to x ≈ 0.25 were synthesized by induction-melting of the elements in sealed tantalum tubes. According to X-ray powder diffraction data, the GdRu x Cd 1−x samples crystallize with the cubic CsCl structure. The structures of two crystals were refined from diffractometer data: Pm3m, a = 372.41(4) pm, wR2 = 0.0363, 45 F 2 , 5 variables for GdRu 0.10(1) Cd 0.90(1) and a = 367.70(4) pm, wR2 = 0.0301, 39 F 2 , 5 variables for GdRu 0.20(1) Cd 0.80(1) . The cadmium-ruthenium substitution has a drastic effect on the magnetic properties. All samples order ferromagnetically, however, the Curie temperature decreases drastically from 258 K for GdCd to 63.6 K for GdRu 0.20 Cd 0.80 with a Vegard-type behavior.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Drastic Decrease of the Curie Temperature in the Solid Solution GdRu_xCd_1–x

Tappe

Schappacher

Hermes

et al. 2009

Zeitschrift Für Naturforschung B

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“…The common structural motifs of these intermetallics are transition metal centered trigonal prisms of the rare earth metals. These prisms are condensed via common rectangular faces in RE 2 T 2 Mg, but via common edges and corners in RE 23 Ir 7 Mg 4 and RE 4 T Mg.…”

Section: Introductionmentioning

confidence: 99%

“…The RE 4 NiMg compounds [7] exist with RE = Y, Pr-Nd, Sm, Gd-Tm, Lu. First property investigations on Gd 4 NiMg revealed antiferromagnetic ordering at 92 K. Gd 4 NiMg absorbs large amounts of hydrogen up to a composition Gd 4 NiMgH 11 .…”

Section: Introductionmentioning

confidence: 99%

Rare Earth-rich Magnesium Compounds RE₄PdMg (RE=Y,Sm,Gd) and RE₄PtMg (RE = Y, Nd, Sm, Gd)

Tuncel

Chevalier

Pöttgena

2008

Zeitschrift Für Naturforschung B

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The rare earth-rich intermetallic magnesium compounds RE 4 PdMg (RE = Y, Sm, Gd) and RE 4 PtMg (RE = Y, Nd, Sm, Gd) were prepared by melting of the elements in sealed tantalum tubes in an induction furnace. These new Gd 4 RhIn-type compounds were characterized by X-ray powder diffraction. The structures of the gadolinium compounds were refined from single crystal X-ray diffractometer data: space group F43m, Z = 16, a = 1388.1(2) pm, wR2 = 0.0392, 381 F 2 values and 20 variables for Gd 4 Pd 1.14 Mg 0.86 and a = 1387.6(2) pm, wR2 = 0.0519, 409 F 2 values, BASF = 0.47(4) and 21 variables for Gd 4 Pt 1.07 Mg 0.93 . The gadolinium atoms build up palladium (platinum) centered trigonal prisms which are condensed via common corners and edges, leading to three-dimensional networks. The magnesium atoms form Mg 4 tetrahedra which show slight mixing with the platinum metal.

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ChemInform Abstract: Rare Earth Metal Rich Magnesium Compounds Ln₄NiMg (Ln: Y, Pr—Nd, Sm, Gd—Tm, Lu) — Synthesis, Structure, and Hydrogenation Behavior.

Tuncel¹,

Roquefere²,

Stan³

et al. 2009

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Nickel I 7300Rare Earth Metal Rich Magnesium Compounds Ln4NiMg (Ln: Y, Pr-Nd, Sm, Gd-Tm, Lu) -Synthesis, Structure, and Hydrogenation Behavior. -The title compounds are prepared from the elements (sealed tantalum tubes, 1300 K, 2 min, 920 K, 2 h) and their structures are determined by powder and single crystal XRD. The Ln4NiMg compounds are isotypic with Gd4RhIn and crystallize in the cubic space group F43m with Z = 16. The structure consists of a three-dimensional network of edge-sharing NiLn 6 trigonal prisms. Mg 4 tetrahedra and additional Ln atoms are located within voids of this framework. The hydrogenation behavior of Y4NiMg and Gd4NiMg is studied. These compounds absorb up to 11 H atoms per formula unit under a hydrogen pressure of 1 MPa at room temperature. At temperatures >363 K decomposition to LnH2/LnH3 hydrides occurs. Gd4NiMg exhibits antiferromagnetic behavior below T N = 92 K, whereas its hydride Gd 4 NiMgH 11 is paramagnetic down to 1.8 K. -(TUNCEL, S.; ROQUEFERE, J. G.; STAN, C.; BOBET, J.-L.; CHEVALIER, B.; GAUDIN, E.; HOFFMANN, R.-D.; RODEWALD, U. C.; POETTGEN*, R.; J. Solid

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Rare earth metal rich magnesium compounds RE4NiMg (RE=Y, Pr–Nd, Sm, Gd–Tm, Lu)—Synthesis, structure, and hydrogenation behavior

Cited by 42 publications

References 22 publications

Drastic Decrease of the Curie Temperature in the Solid Solution GdRu_xCd_1–x

Drastic Decrease of the Curie Temperature in the Solid Solution GdRu_xCd_1–x

Rare Earth-rich Magnesium Compounds RE₄PdMg (RE=Y,Sm,Gd) and RE₄PtMg (RE = Y, Nd, Sm, Gd)

ChemInform Abstract: Rare Earth Metal Rich Magnesium Compounds Ln₄NiMg (Ln: Y, Pr—Nd, Sm, Gd—Tm, Lu) — Synthesis, Structure, and Hydrogenation Behavior.

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Rare earth metal rich magnesium compounds RE4NiMg (RE=Y, Pr–Nd, Sm, Gd–Tm, Lu)—Synthesis, structure, and hydrogenation behavior

Cited by 42 publications

References 22 publications

Drastic Decrease of the Curie Temperature in the Solid Solution GdRuxCd1–x

Drastic Decrease of the Curie Temperature in the Solid Solution GdRuxCd1–x

Rare Earth-rich Magnesium Compounds RE4PdMg (RE=Y,Sm,Gd) and RE4PtMg (RE = Y, Nd, Sm, Gd)

ChemInform Abstract: Rare Earth Metal Rich Magnesium Compounds Ln4NiMg (Ln: Y, Pr—Nd, Sm, Gd—Tm, Lu) — Synthesis, Structure, and Hydrogenation Behavior.

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Drastic Decrease of the Curie Temperature in the Solid Solution GdRu_xCd_1–x

Drastic Decrease of the Curie Temperature in the Solid Solution GdRu_xCd_1–x

Rare Earth-rich Magnesium Compounds RE₄PdMg (RE=Y,Sm,Gd) and RE₄PtMg (RE = Y, Nd, Sm, Gd)

ChemInform Abstract: Rare Earth Metal Rich Magnesium Compounds Ln₄NiMg (Ln: Y, Pr—Nd, Sm, Gd—Tm, Lu) — Synthesis, Structure, and Hydrogenation Behavior.