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Diffusion induced segregation in the case of the ternary system sphalerite, chalcopyrite and cubanite
Author(s) -
Blesgen T.,
Luckhaus S.,
Bente K.
Publication year - 2004
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200410282
Subject(s) - ternary operation , chalcopyrite , diffusion , sphalerite , thermodynamics , phase (matter) , copper , chemistry , ternary numeral system , materials science , mineralogy , pyrite , metallurgy , physics , computer science , organic chemistry , programming language
A mathematical model for describing natural and experimental diffusion induced segregation (DIS) in the case of a (Zn,Fe)S single crystal with three coexisting phases is derived. As main result, a new and quite general segregation principle for ternary systems is discovered where one phase has a flat free energy density and serves as catalyst for the segregation of the other two phases. The model includes also a stochastic noise term to represent fluctuations of the copper concentration. Numerical simulations in 2‐d underline the physical significance of the model and allow to make quantitative predictions. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)