THERMODYNAMIC MODEL AND STRUCTURE OF As2S3-As2Se3 GLASSES BASED ON THE MCR ANALYSIS OF RAMAN SPECTRA

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

THERMODYNAMIC MODEL AND STRUCTURE OF As2S3-As2Se3 GLASSES BASED ON THE MCR ANALYSIS OF RAMAN SPECTRA

Popis výsledku v původním jazyce

Raman spectra and structure of six glasses with the composition of xAs(2)S(3)center dot(1 - x)As2Se3 (x = 1; 0.75; 0.667; 0.50; 0.25; 0) were studied. In our previous work the Raman spectral data were interpreted on the basis of the Shakhmatkin and Vedishcheva thermodynamic model, where the glass was treated as an ideal solution of five components, namely: As2S3, As2Se3, As2S2, AsSe, and Se. The lack of mixed S-Se compounds in the model does not allow the interpretation of the measured spectra taking into account the existence of mixed trigonal pyramids of the Ogle As2S3-xSex. In the present work an alternative simple thermodynamic model was proposed based on two equilibrium reactions leading to formation of two types of mixed As2S3-xSex (x = 1, 2) pyramids. The results of multivariate curve resolution (MCR) analysis of the measured spectra were interpreted as proportional to the molar fractions of four system components: As2S3, As2Se3, As2SSe2, and As2S2Se. Using the nonlinear regress

Název v anglickém jazyce

THERMODYNAMIC MODEL AND STRUCTURE OF As2S3-As2Se3 GLASSES BASED ON THE MCR ANALYSIS OF RAMAN SPECTRA

Popis výsledku anglicky

Raman spectra and structure of six glasses with the composition of xAs(2)S(3)center dot(1 - x)As2Se3 (x = 1; 0.75; 0.667; 0.50; 0.25; 0) were studied. In our previous work the Raman spectral data were interpreted on the basis of the Shakhmatkin and Vedishcheva thermodynamic model, where the glass was treated as an ideal solution of five components, namely: As2S3, As2Se3, As2S2, AsSe, and Se. The lack of mixed S-Se compounds in the model does not allow the interpretation of the measured spectra taking into account the existence of mixed trigonal pyramids of the Ogle As2S3-xSex. In the present work an alternative simple thermodynamic model was proposed based on two equilibrium reactions leading to formation of two types of mixed As2S3-xSex (x = 1, 2) pyramids. The results of multivariate curve resolution (MCR) analysis of the measured spectra were interpreted as proportional to the molar fractions of four system components: As2S3, As2Se3, As2SSe2, and As2S2Se. Using the nonlinear regress

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CA - Anorganická chemie

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Ceramics-Silikaty

ISSN

0862-5468

e-ISSN

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Svazek periodika

58

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

4

Strana od-do

95-98

Kód UT WoS článku

000342735800002

EID výsledku v databázi Scopus

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