Synthesis and characterization of bismuth-containing oxyfluoroniobate glasses

• Published in: Russian journal of inorganic chemistry Vol. 55; no. 6; pp. 925 - 931
• Main Authors: Ignat'eva, L. N, Savchenko, N. N, Surovtsev, N. V, Antokhina, T. F, Polishchuk, S. A, Marchenko, Yu. V, Merkulov, E. B, Buznik, V. M
• Format: Journal Article
• Language: English
• Published: Dordrecht Dordrecht : SP MAIK Nauka/Interperiodica 2010; SP MAIK Nauka/Interperiodica
• Subjects: Bismuth; Bridges (structures); Chemistry; Chemistry and Materials Science; Crystal structure; Glass; Infrared radiation; Inorganic Chemistry; Physical Methods of Investigation; Polyhedra; Polyhedrons; Synthesis; Bismuth; Fluoride Glass; Glass Ceramic Sample; Boson Peak; Differential Scanning Calori
• ISSN: 0036-0236; 1531-8613
• DOI: 10.1134/S003602361006015X

New glasses are prepared in the MnNbOF₅-BaF₂-BiF₃ system. The thermal parameters of these glasses are analyzed as influenced by bismuth trifluoride. IR and Raman spectroscopy shows that the glass structures are built of Nb(O, F)₆ polyhedra, which are linked by oxygen bridges to form glass nets via. A medium-order order region in the glass includes fluoroniobate polyhedra not linked directly to bismuth trifluoride polyhedra. A Ba₀.₅₅Bi₀.₄₅F₂.₄₅ crystalline phase is discovered at 320°C in a glass of composition 20MnNbOF₅-40BaF₂-40BiF₃.