Phase relationships and thermodynamics of refractory metal pnictides: The metal-rich tantalum arsenides

Murray, J.; Taylor, J. B.; Calvert, L. D.; Wang, Yu; Gabe, E. J.; Despault, J.G.

doi:10.1016/0022-5088(76)90220-4

Cited by 47 publications

(55 citation statements)

References 6 publications

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“…Lattice parameters were in good agreement with those of Murray et al (1976) for Ta3As and two sets of data were measured for this crystal and averaged (Table 1). A trial based on a 45 ° rotation of the (Nb,Ta)aAs structure with two Ta3As in the asymmetric unit did not refine.…”

Section: Taaas Andsupporting

confidence: 68%

“…The twinning mechanism found in the refinement of (Nb,Ta)3As provides a possible explanation for the variability of powder patterns and the difficulties of obtaining good single crystals reported by Rundqvist, Carlsson & Pontchour (1969) and Murray et al (1976) as Nb is a frequent contaminant in Ta.…”

Section: Taaas Andmentioning

confidence: 74%

“…However, a previous X-ray fluorescence analysis on this crystal had confirmed the presence of Nb. It seems clear from the structure derived, the values of the cell parameters and the intermediate powder patterns observed (Murray et al, 1976) that Nb3As can dissolve some TaaAs without change of structure.…”

Section: Taaas Andmentioning

confidence: 86%

“…This was confirmed for Nb3As by Rundqvist, Carlsson & Pontchour (1969) but they suggested the Fe3P or a-V3S structure for Ta3As and, in addition, found some of the lines in Ta3As powder patterns split or broadened, but were unable to obtain single crystals. Ta3As was characterized as monoclinic with a new structure type by Murray, Taylor, Calvert, Wang, Gabe & Despault (1976) patterns and single-crystal precession photographs. Their powder patterns were not identical for all samples and their single crystals were twinned or of poor quality.…”

mentioning

confidence: 99%

“…Single-crystal studies were undertaken in an attempt to clarify these discrepancies. Many apparently good single crystals grown by iodide transport in tantalum crucibles (Murray et al, 1976) were examined by Laue photographs and found to be twinned, i.e.…”

mentioning

confidence: 99%

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Structures of Ta₃As and (Nb,Ta)₃As

Wang¹,

Calvert²,

Gabe³

et al. 1979

Acta Crystallogr Sect B

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Te(OH)6.2(NH4)2HPO 4 ET Te(OH) 6. Na2HPO 4. H20 1447 poss6de un voisinage constitu6 par six atomes d'oxyg6ne appartenant ~t trois octa6dres TeO 6 et par la mol6cule d 'eau O(w).L'atome Na(2) est entour6 seulement de six atomes d'oxyg6ne, provenant par moiti6 des octa6dres TeO 6 et des t&ra6dres PO 4.Le Tableau (Nb,Ta)3As of M--M = 3.12 and 3.13 /k, M-As = 2.74 and 2.74 /k and As-As = 3.87 and 3.92 /k respectively. TaaAs is an ordered variant of NbaAs.

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Section: Taaas Andsupporting

confidence: 68%

Section: Taaas Andmentioning

confidence: 74%

Section: Taaas Andmentioning

confidence: 86%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Structures of Ta₃As and (Nb,Ta)₃As

Wang¹,

Calvert²,

Gabe³

et al. 1979

Acta Crystallogr Sect B

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Toward the Effective Exploitation of Topological Phases of Matter in Catalysis: Chemical Reactions at the Surfaces of NbAs and TaAs Weyl Semimetals

Politano

Chiarello

et al. 2018

Adv Funct Materials

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By means of density functional theory and experiments, surface chemical reactivity of single crystals of NbAs and TaAs Weyl semimetals is studied.Weyl semimetals exhibit outstanding reactivity toward simple molecules (oxygen, carbon monoxide, and water), with several active sites available for surface chemical reactions (adsorption, decomposition, formation of reaction products, recombination of decomposition fragments). When different chemical species are adsorbed on Weyl semimetals, strong lateral interactions between coadsorbed species occur, evidenced by CO-promoted water decomposition at room temperature. The resulting OH groups react with CO to form HCOO, which is an intermediate species in watergas shift reaction. These findings unambiguously demonstrate that Weyl semimetals could be effectively used in catalysis, whereas their employment in nanoelectronics or plasmonics is complicated by the poor ambient stability, due to the rapid surface oxidation, inevitably occurring unless protective capping layers are used.

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