The Gd4RhIn type: Crystal chemistry and properties

Pöttgen, Rainer

doi:10.1016/bs.hpcre.2020.09.001

Cited by 12 publications

(6 citation statements)

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“…[59][60][61][62] Besides that, isolated indium [In 5 ] clusters are reported in (Ba 6 N)[In 5 ] [63] and in the more complex (Ba 38 N 18 )[In 5 ] 2 [In 8 ], [64] where next to the [In 5 ] clusters also [In 8 ] clusters are present. Further, tetrahedral [In 4 ] subunits are observed in Tm 4 IrIn 4 , Lu 4 PtIn 4 , Gd 5 RhIn, [65][66][67] (A 19 N 7 )[In 4 ] 2 (A = Sr, Ca) [68] and Na 2 In. [69] While tetrahedral clusters of thallium are present in different alkali metal thallides like Na 23 K 9 Tl 15.3 [70] or Na 2 Tl, [38] isostructural Na 2 In is the exclusive representative including [In 4 ] 8À within the alkali metal -indium system.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of ternary trielides Na₇KTr₄ [Tr=In or Tl] including [Tr₄]⁸⁻ Tetrahedra

Janesch

Schwinghammer

Shenderovich

et al. 2023

Zeitschrift anorg allge chemie

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Two new ternary trielides Na7KTr4 (Tr=In, Tl) have been prepared by classical solid‐state reaction from the elements in tantalum ampoules. Both are isostructural to Na7RbTl4 and therefore crystallize in the orthorhombic space group Pbam (a=16.3202(3)/16.2860(6), b=16.3283(2)/16.2835(6), c=11.3094(2)/11.2771(4), V=3013.74(9)/2990.61(18), R1, wR2=0.0249, 0.0384/0.0447, 0.0608). The trielide subunit is built by two crystallographically independent [Tr4]8− tetrahedra. 23Na NMR as well as EPR spectroscopy was employed to characterize the compounds further. DOS calculations showed a (pseudo) band gap at EF for both compounds. Dissolution experiments in liquid ammonia were carried out for the two alkali metal indides Na7KIn4 and Na2In according to the chemistry of group 14 and 15 Zintl anions. After evaporating the solvent, the remaining material was analyzed by powder X‐ray diffraction and proved the formation of NaIn.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of ternary trielides Na₇KTr₄ [Tr=In or Tl] including [Tr₄]⁸⁻ Tetrahedra

Janesch

Schwinghammer

Shenderovich

et al. 2023

Zeitschrift anorg allge chemie

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“…Figure 4(b) shows the Curie-Weiss fits of all the samples in magnetic fields of 1 T. To reduce the deviation of the reciprocal magnetic susceptibility from the Curie-Weiss behavior, which may be associated with intrinsic factors such as the van Vleck effect, or extrinsic factors such as impurities [80][81][82], we performed the Curie-Weiss fit in 1 T. The paramagnetic Curie temperature can be determined by the intercepts of the Curie-Weiss fit with the x-axis [45]. The total effective magnetic moment µ eff can be calculated by…”

Section: Paramagnetic Curie Temperaturementioning

confidence: 99%

Designing magnetocaloric materials for hydrogen liquefaction with light rare-earth Laves phases

et al. 2023

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Magnetocaloric hydrogen liquefaction could be a “game-changer” for liquid hydrogen industry. Although heavy rare-earth based magnetocaloric materials show strong magnetocaloric effects in the temperature range required by hydrogen liquefaction (77 ~ 20 K), the high resource criticality of the heavy rare-earth elements is a major obstacle for upscaling this emerging liquefaction technology. In contrast, the higher abundances of the light rare-earth elements make their alloys highly appealing for magnetocaloric hydrogen liquefaction. Via a mean-field approach, it is demonstrated that tuning the Curie temperature (TC) of an idealized light rare-earth based magnetocaloric material towards lower cryogenic temperatures leads to larger maximum magnetic and adiabatic temperature changes (ΔST and ΔTad). Especially in the vicinity of the condensation point of hydrogen (20 K), ΔST and ΔTad of the optimized light rare-earth based material are predicted to show significantly large values. Following the mean-field approach and taking the chemical and physical similarities of the light rare-earth elements into consideration, a method of designing light rare-earth intermetallic compounds for hydrogen liquefaction is used: tunning TC of a rare-earth alloy to approach 20 K by mixing light rare-earth elements with different de Gennes factors. By mixing Nd and Pr in Laves phase (Nd,Pr)Al2, and Pr and Ce in Laves phase (Pr, Ce)Al2, a fully light rare-earth intermetallic series with large magnetocaloric effects covering the temperature range required by hydrogen liquefaction is developed, demonstrating a competitive maximum effect compared to the heavy rare-earth compound DyAl2.

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“…The series of Lu 14 Co 3 In 3 type [7,8] phases shows the formation of In 2 dumb-bells (e. g. 309 pm InÀ In in Y 14 Rh 3 In 3 [39] ). The rare motif of In 4 tetrahedra occurs in the Gd 4 RhIn type [2,3] phases (317 pm InÀ In). Comparable InÀ In distances occur in indium monosulfide (276 pm) [40] and indium monoselenide (282 pm).…”

Section: Crystal Chemistrymentioning

confidence: 99%

“…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

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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.

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The Gd4RhIn type: Crystal chemistry and properties

Cited by 12 publications

References 91 publications

Synthesis and characterization of ternary trielides Na₇KTr₄ [Tr=In or Tl] including [Tr₄]⁸⁻ Tetrahedra

Synthesis and characterization of ternary trielides Na₇KTr₄ [Tr=In or Tl] including [Tr₄]⁸⁻ Tetrahedra

Designing magnetocaloric materials for hydrogen liquefaction with light rare-earth Laves phases

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

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The Gd4RhIn type: Crystal chemistry and properties

Cited by 12 publications

References 91 publications

Synthesis and characterization of ternary trielides Na7KTr4 [Tr=In or Tl] including [Tr4]8− Tetrahedra

Synthesis and characterization of ternary trielides Na7KTr4 [Tr=In or Tl] including [Tr4]8− Tetrahedra

Designing magnetocaloric materials for hydrogen liquefaction with light rare-earth Laves phases

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

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Synthesis and characterization of ternary trielides Na₇KTr₄ [Tr=In or Tl] including [Tr₄]⁸⁻ Tetrahedra

Synthesis and characterization of ternary trielides Na₇KTr₄ [Tr=In or Tl] including [Tr₄]⁸⁻ Tetrahedra

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