Publikace detail

Structural study of AsS(2)-Ag glasses over a wide concentration range

Rok: 2011

Druh publikace: článek v odborném periodiku

Název zdroje: Journal of Non-Crystalline Solids

Název nakladatele: Elsevier Science BV

Místo vydání: Amsterdam

Strana od-do: 3430-3434

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	Studium struktury skel AsS(2)-Ag v širokém koncentračním rozsahu	Práce se zabývá studiem struktury skel AsS(2)-Ag v širokém koncentračním rozsahu	Chalcogenidy;skla;fázová separace;struktura;hustota
eng	Structural study of AsS(2)-Ag glasses over a wide concentration range	(As(0.33)S(0.67))(100-x)Ag(x) (0 <= x <= 28) bulk glasses showing micro-phase separation in a wide concentration range have been studied by X-ray diffraction, neutron diffraction and extended X-ray absorption fine structure measurements. The AsAgS(2) composition, which forms a homogeneous glass, is modeled with the reverse Monte-Carlo simulation technique. It is established that Ag prefers the environment of S; Ag-As bonding cannot be observed. Similarly to the AsAgS(2) crystalline modifications smithite and trechmannite, the main structural units of the glass are AsS(3) pyramids. The covalent network of As and S atoms becomes fragmented in the glassy AsAgS(2) unlike in the glassy AsS(2). The environment of Ag atoms in the AsAgS(2) glass differs from that in the crystalline state. In average, each Ag atom has four nearest neighbors, three of them being S and one being Ag	Chalcogenides; glasses; phase separation; structure; density

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