A Cluster Model for Tetrahedrally Coordinated Chalcogenide Phases

Leute, Volkmar

doi:10.1002/bbpc.19910950610

Ber Bunsenges Phys Chem

1991

DOI: 10.1002/bbpc.19910950610

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A Cluster Model for Tetrahedrally Coordinated Chalcogenide Phases

Volkmar Leute

Abstract: A model is described, which allows to calculate the energy dependent cluster probabilities for quasiternary systems of type AX/BX/CX, based on a concept of reactions between tetrahedral clusters. It is shown. that for the quasibinary section A3X3/B2CX3 with C standing for structural vacancies, the cluster model allows predictions concerning the occurence of ordered compounds.

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Cited by 6 publications

References 21 publications

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Ordering Phenomena and Demising in the Quasiternary System HgTe/CdTe/Ga₂Te₃

Zeppenfeld

Leute

1992

Ber Bunsenges Phys Chem

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The phase diagram of the quasiternary system Hg(3–3k‐3l)Cd3lGa2kTe3 for the temperature range 600 < T/K < 1000 was investigated by X‐ray diffraction, by DTA and DSC measurements, and by electron microprobe analysis. It is shown that ordered structures are formed at special concentrations of structural vacancies. Depending on temperature and concentration, continuous order‐disorder transitions can be detected. Beside a spinodal miscibility gap, several structural miscibility gaps and a three phase region occur.s

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Ordering Phenomena and Demising in the Quasiternary System HgTe/CdTe/Ga₂Te₃

Zeppenfeld

Leute

1992

Ber Bunsenges Phys Chem

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Interdiffusion in the quasibinary systems Cd₃Te₃/Ga₂Te₃ and Hg₃Te₃/Ga₂Te₃

Leute

Zeppenfeld

1994

Ber Bunsenges Phys Chem

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The quasibinary systems Cd3Te3/Ga2Te3 (I) and Hg3Te3/Ga2Te3 (II) form regions of extended solid solution. The interdiffusion of the cationic components in these regions is coupled with a flux of so‐called structural vacancies. Peculiarities in the composition and temperature dependence of the interdiffusion coefficient, measured by an electron microprobe, are due to the effect of the thermodynamic factor. The calculation of the thermodynamic factor is based on a model of tetrahedral clusters. Special features of the phase diagrams of systems I and II are used to estimate the cluster energies. By use of these cluster energies the free excess enthalpy of the solid solution is calculated, and therefrom the thermodynamic factor can be derived. The course of the interdiffusion coefficient is caused by totally different influencies: in system I by a trend towards spinodal demixing, in system II by a trend towards ordering.

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Ordering phenomena and demixing in the quasiternary system HgTe/CdTe/In2Te3

Weitze

Schmidtke

Leute

1996

Journal of Alloys and Compounds

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A Cluster Model for Tetrahedrally Coordinated Chalcogenide Phases

Cited by 6 publications

References 21 publications

Ordering Phenomena and Demising in the Quasiternary System HgTe/CdTe/Ga₂Te₃

Ordering Phenomena and Demising in the Quasiternary System HgTe/CdTe/Ga₂Te₃

Interdiffusion in the quasibinary systems Cd₃Te₃/Ga₂Te₃ and Hg₃Te₃/Ga₂Te₃

Ordering phenomena and demixing in the quasiternary system HgTe/CdTe/In2Te3

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A Cluster Model for Tetrahedrally Coordinated Chalcogenide Phases

Cited by 6 publications

References 21 publications

Ordering Phenomena and Demising in the Quasiternary System HgTe/CdTe/Ga2Te3

Ordering Phenomena and Demising in the Quasiternary System HgTe/CdTe/Ga2Te3

Interdiffusion in the quasibinary systems Cd3Te3/Ga2Te3 and Hg3Te3/Ga2Te3

Ordering phenomena and demixing in the quasiternary system HgTe/CdTe/In2Te3

Contact Info

Product

Resources

About

Ordering Phenomena and Demising in the Quasiternary System HgTe/CdTe/Ga₂Te₃

Ordering Phenomena and Demising in the Quasiternary System HgTe/CdTe/Ga₂Te₃

Interdiffusion in the quasibinary systems Cd₃Te₃/Ga₂Te₃ and Hg₃Te₃/Ga₂Te₃