EXAFS解析によるAgI-Ag<sub>2</sub>O-GeO<sub>2</sub>系ガラス中のAgの配位

DOI Web Site Web Site

書誌事項

タイトル別名
  • An EXAFS Study of Coordination of Ag in AgI-Ag<sub>2</sub>O-GeO<sub>2</sub> Glasses
  • EXAFS カイセキ ニ ヨル AgI Ag2O GeO2ケイ ガラスチュウ

この論文をさがす

抄録

Local structures around Ag+ ions in ion-conducting glasses in the system AgI-Ag2O-GeO2 were investigated by Ag K EXAFS (extended X-ray absorption fine structure) analysis. By using Ag2O and AgI crystals as reference samples, average Ag-O and Ag-I distances for three kinds of glass samples were estimated from |F(r)| curves to be 2.15-2.22Å and 2.74-2.87Å, respectively. The Ag-O atomic distances suggest that a part of Ag+ ions locate near the polygermanate anions which consisted of GeO4 tetrahedra. As the Ag+ ions of this type are strongly bonded to O2- ions, they do not contribute to the ionic conduction. It was also concluded on the basis of the Ag-I atomic distances that the rest of Ag+ ions locate at tetrahedral sites surrounded by four I- ions. Since the coodinations of these Ag+ ions are similar to those of Ag+ ions in AgI crystals which show ionic conductivity, the Ag+ ions of this type contribute to the ionic conduction.

収録刊行物

  • 窯業協會誌

    窯業協會誌 95 (1101), 551-555, 1987

    公益社団法人 日本セラミックス協会

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ