Structural modification and optical reflectivity of new gold–indide intermetallic compounds

Palasyuk, Andriy; Maggard, Paul A.

doi:10.1016/j.jallcom.2009.10.152

Cited by 4 publications

(2 citation statements)

References 17 publications

(37 reference statements)

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“…Figure shows the distribution of known ternary phases in the Sr–Au–In system; SrAuIn 3 ( I 4 mm ), SrAu 1.06 In 2.94 ( I 4/ mmm ), Sr 2 Au 2.85 In 4.15 ( P 6̅2 m ), Sr 4 Au 9 In 13 ( P 6̅ m 2), SrAu 3.35 In 4.65 ( P 2 1 / m ), SrAu 3.76 In 4.24 ( Pnma ), SrAuIn ( Pnma ), SrAu 2 In 2 ( Pnma ), and SrAu 3 In 3 ( Pmmn ), which are numbered from 1 to 9 in the figure. As shown, these phases aggregate in a region in which the valence electron count per atom (e/a) values fall within a range of 2.0–2.4.…”

Section: Resultsmentioning

confidence: 99%

Exploratory Syntheses and Structures of SrAu_4.3In_1.7 and CaAg_3.5In_1.9: Electron-Poor Intermetallics with Diversified Polyanionic Frameworks That Are Derived from the CaAu₄In₂ Approximant

Lin

Corbett

2011

Inorg. Chem.

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The phase regions around quasicrystals and approximants (QC/ACs) are rich pools for electron-poor intermetallics with novel, complex structures, and bonding patterns. The present SrAu(4.30(1))In(1.70(1)) (1) and CaAg(3.54(1))In(1.88(1)) (2) were synthesized through chemical tunings of the model CaAu(4)In(2) (YCd(6)-Type) AC. Single crystal X-ray diffraction analyses reveals that crystal 1 has Pnma (CeCu(6)-type) symmetry, with a = 9.102(1) Å, b = 5.6379(9) Å, and c = 11.515(2) Å. The building block in 1 is a 19-vertex cluster Sr@Au(9)In(4)M(6) (M = Au/In), which vividly mimics Ca@(Au,In)(18) in Ca(3)Au(12.4)In(6.1) (YCd(6)-type) in geometry. These clusters aggregate into one-dimensional columns extending along the b axis. Crystal 2 (P6/mmm, a = 20.660(3) Å, c = 9.410(2) Å) is closely related to Na(26)Cd(141) (hP167) and Y(13)Pd(40)Sn(31) (hP168), which are differentiated by the selective occupation of Wyckoff 1a (0 0 0) or 2d (1/3 2/3 1/2) sites by Cd or Pd. Crystal 2 adopts the Na(26)Cd(141) structure, but the 1a site is split into two partially occupied sites. The synergistic disorder in the hexagonal tunnels along c is a major property. The valence electron count per atom (e/a) values for 1 and 2 are 1.63 and 1.74, respectively, the lowest among any other ternary phases in each system. These values are close to those of ACs in the Ca-Au-M (M = Ga, In) systems. Electronic structures for both are discussed in terms of the results of TB-LMTO-ASA calculations.

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Section: Resultsmentioning

confidence: 99%

Exploratory Syntheses and Structures of SrAu_4.3In_1.7 and CaAg_3.5In_1.9: Electron-Poor Intermetallics with Diversified Polyanionic Frameworks That Are Derived from the CaAu₄In₂ Approximant

Lin

Corbett

2011

Inorg. Chem.

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“…Thus, model B seems to be preferable. Examples of mixed occupancy of the same positions by In atoms together with atoms of noble metals (Au and Pd) in intermetallics are known in the literature (Dmytriv et al, 2011;Palasyuk & Maggard, 2010), though they are not frequent. This is also consistent with the character of the atomic distribution in the CuAu-type structure of the binary InPd 3 phase, where In also gives a mixed occupancy with Pd (Kohlmann & Ritter, 2007, 2009.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and crystal structure of a new Cu₃Au-type ternary phase in the Au–In–Pd system: distribution of atoms over crystallographic positions

Ptashkina

Kabanova

Турсина

et al. 2018

Acta Crystallogr C Struct Chem

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A new CuAu-type ternary phase (τ phase) is found in the AuPd-rich part of the Au-In-Pd system. It has a broad homogeneity range based on extensive (Pd,Au) and (In,Au) replacement, with the composition varying between AuInPd and AuInPd. The occupancies of the crystallographic positions were studied by single-crystal X-ray diffraction for three samples of different composition. The sites with m-3m symmetry are occupied by atoms with a smaller scattering power than the atoms located on 4/mmm sites. Two extreme structure models were refined. Within the first, the occupation type changes from (Au,In,Pd)(Pd,In) to (Au,Pd)(In,Pd,Au) with an increase in the Au gross content. For the second model, the occupation type (Au,In,Pd)(Pd,Au) remains essentially unchanged for all Au concentrations. Although the diffraction data do not allow the choice of one of these models, the latter model, where Au substitutes In on 4/mmm sites, seems to be preferable, since it agrees with the fact that the homogeneity range of the τ phase is inclined to the Au corner and provides the same occupation type for all the studied samples of different compositions.

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ChemInform Abstract: Structural Modification and Optical Reflectivity of New Gold‐Indide Intermetallic Compounds.

Palasyuk

Maggard

2010

ChemInform

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Structural modification and optical reflectivity of new gold–indide intermetallic compounds

Cited by 4 publications

References 17 publications

Exploratory Syntheses and Structures of SrAu_4.3In_1.7 and CaAg_3.5In_1.9: Electron-Poor Intermetallics with Diversified Polyanionic Frameworks That Are Derived from the CaAu₄In₂ Approximant

Exploratory Syntheses and Structures of SrAu_4.3In_1.7 and CaAg_3.5In_1.9: Electron-Poor Intermetallics with Diversified Polyanionic Frameworks That Are Derived from the CaAu₄In₂ Approximant

Synthesis and crystal structure of a new Cu₃Au-type ternary phase in the Au–In–Pd system: distribution of atoms over crystallographic positions

ChemInform Abstract: Structural Modification and Optical Reflectivity of New Gold‐Indide Intermetallic Compounds.

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Structural modification and optical reflectivity of new gold–indide intermetallic compounds

Cited by 4 publications

References 17 publications

Exploratory Syntheses and Structures of SrAu4.3In1.7 and CaAg3.5In1.9: Electron-Poor Intermetallics with Diversified Polyanionic Frameworks That Are Derived from the CaAu4In2 Approximant

Exploratory Syntheses and Structures of SrAu4.3In1.7 and CaAg3.5In1.9: Electron-Poor Intermetallics with Diversified Polyanionic Frameworks That Are Derived from the CaAu4In2 Approximant

Synthesis and crystal structure of a new Cu3Au-type ternary phase in the Au–In–Pd system: distribution of atoms over crystallographic positions

ChemInform Abstract: Structural Modification and Optical Reflectivity of New Gold‐Indide Intermetallic Compounds.

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Exploratory Syntheses and Structures of SrAu_4.3In_1.7 and CaAg_3.5In_1.9: Electron-Poor Intermetallics with Diversified Polyanionic Frameworks That Are Derived from the CaAu₄In₂ Approximant

Exploratory Syntheses and Structures of SrAu_4.3In_1.7 and CaAg_3.5In_1.9: Electron-Poor Intermetallics with Diversified Polyanionic Frameworks That Are Derived from the CaAu₄In₂ Approximant

Synthesis and crystal structure of a new Cu₃Au-type ternary phase in the Au–In–Pd system: distribution of atoms over crystallographic positions