Structure of CaO-Ga/sub 2/O/sub 3/-GeO/sub 2/ glasses: X-ray and molecular dynamics simulation studies.

• Autorzy: Padlyak B. , Mudry S. , Halchak V. , Korolyshyn A. , Rybicki J , Witkowska A.
• Języki publikacji: EN

Abstrakty

EN

The X-ray scattering data for CaO-Ga/sub 2/O/sub 3/-GeO/sub 2/ glasses of stoichiometric compositions similar to that of calcium-gallium-germanium garnet (Ca/sub 3/Ga/sub 2/Ge/sub 3/O/sub 12/) Ca-gallogermanate (Ca/sub 3/Ga/sub 2/Ge/sub 4/O/sub 14/) and Ca/sub 3/Ga/sub 2/O/sub 6/ crystals are presented. Experimental results show the true glass structure of the compounds under investigation. A comparative analysis of the X-ray data for glasses and their crystalline analogies has shown that the glass network consists of gallium and germanium oxygen co-ordinated octahedra and tetrahedra. The results obtained have been compared with the results of preliminary molecular dynamics (MD) calculations of the structure of CaO-Ga/sub 2/O/sub 3/-GeO/sub 2/ glasses. The pair distribution functions (PDFs) obtained from the MD simulation, show satisfactory agreement with the X-ray data The building blocks of the CaO-Ga/sub 2/O/sub 3/-GeO/sub 2/ glass network have been proposed. The structure peculiarities of the glasses and their crystalline analogies are discussed.

Słowa kluczowe

EN

X-ray studies; molecular dynamics simulation studies; X-ray scattering data; stoichiometric compositions; glass structure; comparative analysis; glass; crystalline analogies

PL

szkło; dynamika molekularna; promieniowanie rentgenowskie; struktura szkła

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2000
• Tom: Vol. 30, nr 4
• Strony: 691--699
• Opis fizyczny: Bibliogr. 9 poz., rys. 6,

Twórcy

autor

Padlyak B.

autor

Mudry S.

autor

Halchak V.

autor

Korolyshyn A.

autor

Rybicki J

autor

Witkowska A.

• Institute of Experimental Physics, University of Gdańsk, ul. Wita Stwosza 57, 80-952 Gdańsk, Poland.