Study of filled Ti2Ni-type phases with hafnium, tantalum, and tungsten

Kotyk, M.; Stadelmaier, H. H.

doi:10.1007/bf02811771

Cited by 6 publications

(1 citation statement)

References 8 publications

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“…The most distinguished feature of the Ti 2 Ni-type structure is a rich variety of interstitial sites available for small atoms of the elements like H, C, N, O. Since Westgren's first determination of the so called η-carbide structure W 3 Fe 3 C (filled up derivative of Ti 2 Ni with C in [W 6 ] octahedral voids (16d, 1 2 , 1 2 , 1 2 )), 2 innumerable examples of phases containing two or more transition metals and carbon, [3][4][5][6][7][8][9][10][11] nitrogen [12][13][14][15] or oxygen [16][17][18][19][20][21] have been observed including fully ordered quaternary examples such as Ti 3 NiAl 2 N and others. 22 More recently, the complex Ti 2 Ni-type metal nitrides and hydrides attract a considerable attention as promising catalytic 23,24 and hydrogen storage 25,26 materials, respectively.…”

Section: Introductionmentioning

confidence: 99%

Boron induced structure modifications in Pd–Cu–B system: new Ti₂Ni-type derivative borides Pd₃Cu₃B and Pd₅Cu₅B₂

et al. 2016

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The formation of two distinct derivative structures of Ti2Ni-type, interstitial Pd3Cu3B and substitutive Pd5Cu5B2, has been elucidated in Pd-Cu-B alloys from analysis of X-ray single crystal and powder diffraction data and supported by SEM. The metal atom arrangement in the new boride Pd3Cu3B (space group Fd3m, W3Fe3C-type structure, a = 1.1136(3) nm) follows the pattern of atom distribution in the CdNi-type structure. Pd5Cu5B2 (space group F(4)3m, a = 1.05273(5) nm) exhibits a non-centrosymmetric substitutive derivative of the Ti2Ni-type structure. The reduction of symmetry on passing from Ti2Ni-type structure to Pd5Cu5B2 corresponds to the loss of an inversion centre delivered by an ordered occupation of the Ni position (32e) by dissimilar atoms, Cu and B. In both structures, the boron atom centers Pd forming [BPd6] octahedra in Pd3Cu3B and [BPd6] trigonal prisms in Pd5Cu5B2. Neither a perceptible homogeneity range nor mutual solid solubility was observed for two compounds at 600 °C, while in as cast conditions Pd5Cu5B2 exhibits an extended homogeneity range formed by a partial substitution of Cu atoms (in 24f) by Pd (Pd5+xCu5-xB2, 0 ≤x≤ 1). Electrical resistivity measurements performed on Pd3Cu3B as well as on Pd-poor and Pd-rich termini of Pd5+xCu5-xB2 annealed at 600 °C and in as cast conditions respectively demonstrated the absence of any phase transitions for this compounds in the temperature region from 0.3 K to 300 K.

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Section: Introductionmentioning

confidence: 99%

Boron induced structure modifications in Pd–Cu–B system: new Ti₂Ni-type derivative borides Pd₃Cu₃B and Pd₅Cu₅B₂

et al. 2016

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Nitrides of Non‐Main Group Elements

Höhn

Niewa

2017

Handbook of Solid State Chemistry

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In the last two decades, there has been a renewed interest in the chemistry of nitrides and nitridometalates. Both binary and higher nitridesMxNyhave already featured prominently as refractory materials, corrosion‐ and mechanical wear‐resistant coatings, hard materials, and hard magnets; thin films are used as diffusion barriers in integrated circuits.Whereas research on binary transition metal nitrides is mostly driven by technical and economic interests, the investigation on nitridometalates primarily focuses on exploration with respect to the development of new synthetic strategies and the design of new materials. Within this field of interest, especially the nitride chemistry of rare earth metals is still comparably undeveloped.Chemical bonding in binary nitrides varies from primarily salt‐like via covalent to metallic, whereas nitridometalates are best described as containing covalent complex anions [MxNy]z−with alkali, alkaline earth, or rare earth metal cations providing electroneutrality.

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Iron – Oxygen – Tungsten

Korniyenko

2009

Landolt-Börnstein - Group IV Physical Chemistry

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Study of filled Ti2Ni-type phases with hafnium, tantalum, and tungsten

Cited by 6 publications

References 8 publications

Boron induced structure modifications in Pd–Cu–B system: new Ti₂Ni-type derivative borides Pd₃Cu₃B and Pd₅Cu₅B₂

Boron induced structure modifications in Pd–Cu–B system: new Ti₂Ni-type derivative borides Pd₃Cu₃B and Pd₅Cu₅B₂

Nitrides of Non‐Main Group Elements

Iron – Oxygen – Tungsten

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Study of filled Ti2Ni-type phases with hafnium, tantalum, and tungsten

Cited by 6 publications

References 8 publications

Boron induced structure modifications in Pd–Cu–B system: new Ti2Ni-type derivative borides Pd3Cu3B and Pd5Cu5B2

Boron induced structure modifications in Pd–Cu–B system: new Ti2Ni-type derivative borides Pd3Cu3B and Pd5Cu5B2

Nitrides of Non‐Main Group Elements

Iron – Oxygen – Tungsten

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Product

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Boron induced structure modifications in Pd–Cu–B system: new Ti₂Ni-type derivative borides Pd₃Cu₃B and Pd₅Cu₅B₂

Boron induced structure modifications in Pd–Cu–B system: new Ti₂Ni-type derivative borides Pd₃Cu₃B and Pd₅Cu₅B₂