Ge30AsxSe70-x bulk glasses from the point of view of chemistry

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F20%3A39916493" target="_blank" >RIV/00216275:25310/20:39916493 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0022459620304291?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0022459620304291?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jssc.2020.121599" target="_blank" >10.1016/j.jssc.2020.121599</a>

Result language

angličtina

Original language name

Ge30AsxSe70-x bulk glasses from the point of view of chemistry

Original language description

To elucidate the chemical structure of Ge-As-Se based glasses with selenium substoichiometry, Ge30AsxSe70-x homogeneous bulk glasses were prepared and the glass-forming region was found from x = 0 up to 40. The chemical structure of these glasses was characterized by basic structural units. The structure of Ge30Se70 (x = 0) glass is based on GeSe4/2 and GeSe4 structural units and traces of selenium. When selenium is gradually replaced with arsenic AsSe3/2 and Ge(II)As(2/3 )structural units appear in the equimolar ratio with gradually increasing concentrations at the expense of the units with Ge-Se bonds. Finally, for x = 40 the glass is formed exclusively by structural units AsSe3/2 and GeAs2/3. Thus, the structure of both border glasses is based only on two structural units whereas other glasses are based on four units. For this reason, the undercooled melts of both border glasses are less stable and undergo crystallization when heated. In terms of the geometry of the basic structures, the structure for x = 0 is formed solely by tetrahedral units with germanium as the central atom, and then is gradually transformed with increasing concentration of arsenic to a structure consisting only of trigonal pyramids with arsenic as a central atom.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

Journal of Solid State Chemistry

ISSN

0022-4596

e-ISSN

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Volume of the periodical

291

Issue of the periodical within the volume

November

Country of publishing house

US - UNITED STATES

Number of pages

8

Pages from-to

121599

UT code for WoS article

000574668600012

EID of the result in the Scopus database

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