کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1331308 1500075 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Isomorphism and solid solutions among Ag- and Au-selenides
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Isomorphism and solid solutions among Ag- and Au-selenides
چکیده انگلیسی


• Au-Ag selenides were synthesized.
• Limited Ag-Au isomorphism in the selenides is affected by structural features.
• Some new phases were introduced to the phase diagram Ag-Au-Se.

Au-Ag selenides were synthesized by heating stoichiometric mixtures of elementary substances of initial compositions Ag2−xAuxSe with a step of х=0.25 (0≤х≤2) to 1050 °С and annealing at 500 °C. Scanning electron microscopy, optical microscopy, electron microprobe analysis and X-ray powder diffraction methods have been applied to study synthesized samples. Results of studies of synthesized products revealed the existence of three solid solutions with limited isomorphism Ag↔Au: naumannite Ag2Se – Ag1.94Au0.06Se, fischesserite Ag3AuSe2 - Ag3.2Au0.8Se2 and gold selenide AuSe - Au0.94Ag0.06Se. Solid solutions and AgAuSe phases were added to the phase diagram of Ag-Au-Se system. Crystal-chemical interpretation of Ag-Au isomorphism in selenides was made on the basis of structural features of fischesserite, naumannite, and AuSe.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 241, September 2016, Pages 157–163
نویسندگان
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