Rare Earth Metal‐Rich Magnesium Compounds RE4IrMg (RE = Y, La, Pr, Nd, Sm, Gd, Tb, Dy) and RE23Ir7Mg4 (RE = La, Ce, Pr, Nd)

Rodewald, Ute Ch.; Tuncel, Selcan; Chevalier, Bernard; Pöttgen, Rainer

doi:10.1002/zaac.200700552

Cited by 37 publications

(9 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such segregations are not unusual in metal‐rich compounds. Besides the Cd 2 pairs reported herein we already observed Cd 4 tetrahedra in the Gd 4 RhIn type29 series RE 4 T Cd,9 in the Pr 23 Ir 7 Mg 4 type30 series RE 23 T 7 Cd 4 9 and the new structure type La 15 Rh 5 Cd 2 31. Pair formation occurs also for the indium atoms in the rare earth metal‐rich compounds RE 14 T 3 In 3 ( T = Co, Ni, Rh).…”

Section: Resultssupporting

confidence: 64%

Segregation of Cd₂ Pairs in CaCu₉Cd₂ and EuCu₉Cd₂

Tappe

Schwickert

Pöttgen

2012

Zeitschrift anorg allge chemie

Self Cite

View full text Add to dashboard Cite

The copper-rich intermetallics CaCu 9 Cd 2 and EuCu 9 Cd 2 were synthesized from the elements in sealed tantalum tubes in a highfrequency furnace. Both compounds were characterized by X-ray powder and single crystal diffraction: Ce(Mn 0.55 Ni 0.45 ) 11 type, P4/mbm, a = 844.2(1), c = 504.72(8) pm, wR2 = 0.0216, 345 F 2 values, 23 variables for CaCu 9 Cd 2 and a = 844.1(2), c = 505.5(1) pm, wR2 = 0.0200, 331 F 2 values, 24 variables for EuCu 9.14 Cd 1.86 . The europium-based crystal showed a small mixed Cu/Cd occupancy on the 4g site. The calcium (europium) atoms have the high coordination number 20 * Prof. Dr. R. Pöttgen E-Mail: pottgen@uni-muenster.de [a]

show abstract

Section: Resultssupporting

confidence: 64%

Segregation of Cd₂ Pairs in CaCu₉Cd₂ and EuCu₉Cd₂

Tappe

Schwickert

Pöttgen

2012

Zeitschrift anorg allge chemie

Self Cite

View full text Add to dashboard Cite

show abstract

“…The Dy-containing sample was selected for closer inspection by metallographic analysis, which provided evidence for the existence of a new ternary phase (Figure S1). Analysis of the powder XRD pattern of this sample suggested that this phase probably adopts either the hexagonal Pr 23 Ir 7 Mg 4 - or Yb 23 Cu 7 Mg 4 -type structure, so its precise chemical formula would be Dy 23 Ni 7 In 4 . With this information at hand, the powder XRD patterns for the other samples were re-examined to show that the ternary phase RE 23 Ni 7 In 4 also forms for RE = Gd and Tb, but not for RE = Y and Ho.…”

Section: Resultsmentioning

confidence: 97%

“…The structural assignment for RE 23 Ni 7 In 4 was reasoned by searching for examples of compounds with similar chemical compositions within RE–T–X systems, where X are s-block, late d-block, or p-block element (e.g., Li, Mg, Cd, Zn, Al, Ga). Initially, the noncentrosymmetric Pr 23 Ir 7 Mg 4 -type structure (space group P 6 3 mc ) was assumed on the basis of its prevalence in Pearson’s Crystal Data, with nearly 60 representatives known. Moreover, it is adopted by Ce 23 Ru 7 In 4 , which is closely related in chemical composition to RE 23 Ni 7 In 4 .…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Ternary Rare-Earth-Metal Nickel Indides RE₂₃Ni₇In₄ (RE = Gd, Tb, Dy) with Yb₂₃Cu₇Mg₄-Type Structure

et al. 2021

View full text Add to dashboard Cite

The ternary rare-earth-metal nickel indides RE 23 Ni 7 In 4 (RE = Gd, Tb, Dy) were prepared by arc-melting mixtures of the elements followed by annealing at 870 K. They adopt the Yb 23 Cu 7 Mg 4 -type structure (space group P6 3 /mmc, Pearson symbol hP68, Z = 2), as determined by laboratory and synchrotron powder diffraction methods for RE = Gd (a = 9.6435(10) Å, c = 22.118(3) Å) and Tb (a = 9.5695(8) Å, c = 21.983(3) Å), and single-crystal X-ray diffraction methods for RE = Dy (a = 9.533(5) Å, c = 21.890(13) Å). The centrosymmetric Yb 23 Cu 7 Mg 4 -type structure is closely related to the noncentrosymmetric Pr 23 Ir 7 Mg 4 -type structure. Triangular In 3 clusters within RE 23 Ni 7 In 4 represent a rare type of cluster found among metal-rich indides; the reasons for their formation were investigated by density functional theory methods.

show abstract

“…The crystal chemistry of rare earth ( RE )‐rich phases in the ternary systems RE ‐ T ‐ X ( T =electron‐rich transition metal; X =Mg, Cd, Al, In) is dominated by a few structure types with a larger number of representatives, [1] namely Gd 4 RhIn, [2,3] Pr 23 Ir 7 Mg 4 , [4] Pr 15 Rh 5 Cd 2 , [5] Y 10 RuCd 3 , [6] Lu 14 Co 3 In 3 , [7,8] and Ho 6 Co 2 Ga, [9] besides some peculiar structure types. The high rare‐earth content of these different compounds leads to some common structural motifs.…”

Section: Introductionmentioning

confidence: 99%

Lu₂₀Ir₅In₃ and Lu₂₀Pt₅In₃ – superstructures of the Al₅Co₂ type by coloring and distortion

Pöttgen

Gulay

Reimann

et al. 2021

Zeitschrift anorg allge chemie

Self Cite

View full text Add to dashboard Cite

Dedicated to Professor Caroline Röhr on the Occasion of her 60 th Birthday The lutetium-rich intermetallic compounds Lu 20 Ir 5 In 3 and Lu 20 Pt 5 In 3 were synthesized from the elements in sealed tantalum ampules in an induction furnace. The phase purity of the samples was checked by powder X-ray diffraction. The structures of Lu 20 Ir 5 In 3 and Lu 20 Pt 5 In 3 were refined from single crystal X-ray diffractometer data: P � 62m, a = 1618.53(4), c = 919.36(4) pm, wR2 = 0.0588, 2665 F 2 values, 88 variables for Lu 20 Ir 5 In 3 and a = 1630.58(4), c = 920.43(4) pm, wR2 = 0.0836, 3024 F 2 values, 89 variables for Lu 19.92 Pt 5 In 3 . The platinum compound showed small amounts of defects on one lutetium site. Lu 20 Ir 5 In 3 and Lu 20 Pt 5 In 3 are non-centrosymmetric super-structures (through coloring and distortions) that derive from the aristotype Al 5 Co 2 via two steps of symmetry reduction (P6 3 / mmc!P6 3 /mcm!P � 62m). The structures are discussed together with the coloring variants Y 10 RuCd 3 and Y 9 CoMg 4 on the basis of a group subgroup scheme. Striking features of the Lu 20 Ir 5 In 3 structure are short IrÀ Lu contacts and the structural segregation of In 3 triangles (300 and 315 pm InÀ In) that are solely coordinated by lutetium atoms. Temperature dependent magnetic susceptibility studies of the Lu 20 Ir 5 In 3 and Lu 20 Pt 5 In 3 samples indicate Pauli paramagnetism.

show abstract

Rare Earth Metal‐Rich Magnesium Compounds RE₄IrMg (RE = Y, La, Pr, Nd, Sm, Gd, Tb, Dy) and RE₂₃Ir₇Mg₄ (RE = La, Ce, Pr, Nd)

Cited by 37 publications

References 26 publications

Segregation of Cd₂ Pairs in CaCu₉Cd₂ and EuCu₉Cd₂

Segregation of Cd₂ Pairs in CaCu₉Cd₂ and EuCu₉Cd₂

Ternary Rare-Earth-Metal Nickel Indides RE₂₃Ni₇In₄ (RE = Gd, Tb, Dy) with Yb₂₃Cu₇Mg₄-Type Structure

Lu₂₀Ir₅In₃ and Lu₂₀Pt₅In₃ – superstructures of the Al₅Co₂ type by coloring and distortion

Contact Info

Product

Resources

About

Rare Earth Metal‐Rich Magnesium Compounds RE4IrMg (RE = Y, La, Pr, Nd, Sm, Gd, Tb, Dy) and RE23Ir7Mg4 (RE = La, Ce, Pr, Nd)

Cited by 37 publications

References 26 publications

Segregation of Cd2 Pairs in CaCu9Cd2 and EuCu9Cd2

Segregation of Cd2 Pairs in CaCu9Cd2 and EuCu9Cd2

Ternary Rare-Earth-Metal Nickel Indides RE23Ni7In4 (RE = Gd, Tb, Dy) with Yb23Cu7Mg4-Type Structure

Lu20Ir5In3 and Lu20Pt5In3 – superstructures of the Al5Co2 type by coloring and distortion

Contact Info

Product

Resources

About

Rare Earth Metal‐Rich Magnesium Compounds RE₄IrMg (RE = Y, La, Pr, Nd, Sm, Gd, Tb, Dy) and RE₂₃Ir₇Mg₄ (RE = La, Ce, Pr, Nd)

Segregation of Cd₂ Pairs in CaCu₉Cd₂ and EuCu₉Cd₂

Segregation of Cd₂ Pairs in CaCu₉Cd₂ and EuCu₉Cd₂

Ternary Rare-Earth-Metal Nickel Indides RE₂₃Ni₇In₄ (RE = Gd, Tb, Dy) with Yb₂₃Cu₇Mg₄-Type Structure

Lu₂₀Ir₅In₃ and Lu₂₀Pt₅In₃ – superstructures of the Al₅Co₂ type by coloring and distortion