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Oscillatory zonation of minerals and self-organization in silicate solid-solution systems; a new nonlinear dynamic model

Wang Jianghai and Wu Jinping
Oscillatory zonation of minerals and self-organization in silicate solid-solution systems; a new nonlinear dynamic model
European Journal of Mineralogy (October 1995) 7 (5): 1089-1100

Abstract

A new non-ideal, disequilibrium and non-linear dynamic model is presented to describe the process of crystal growth in the melt f = 1/[1 + (beta /X (super s) )exp(-W/RT)(1-2f], where f and X (super s) are, respectively, the mole fractions of a component of the crystal and melt at the interface, W the total interchange energy, R the gas constant, T temperature and beta = k (sub B) /k (sub A) , with k (sub A) and k (sub B) representing the rate constants of components A and B. Results of the numerical simulation of this model demonstrate that a domain of triple-valued compositions exists if W/RT <<<$I> -2. Together with mass-balance equations, this model explains satisfactorily the oscillatory zonation patterns in silicate solid-solution systems, indicating that self-organization is responsible for the development of such profiles during crystal growth. [Authors' abstract]


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 7
Serial Issue: 5
Title: Oscillatory zonation of minerals and self-organization in silicate solid-solution systems; a new nonlinear dynamic model
Affiliation: Chinese Academy of Sciences, Guangzhou Institute of Geochemistry, Guangzhou, China
Pages: 1089-1100
Published: 199510
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 63
Accession Number: 1996-001700
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Secondary Affiliation: China University of Geosciences, CHN, China
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 199601
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