Local structure around Ni2+ ions in sodium borate glasses

Q. Xu; T. Maekawa; K. Kawamura; T. Yokokawa

Local structure around Ni²⁺ ions in sodium borate glasses

Q. Xu, T. Maekawa, K. Kawamura, T. Yokokawa

Graduate School of Environmental and Life Science

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

A study of the extended x-ray absorption fine structure of sodium borate glasses containing 1 mol% NiO gave a Ni-O bond length of 1.99-2.04 A depending upon the composition of the glass. It indicated that the coordination number of the Ni²⁺ ion begins to change at 15-20 mol% Na₂O, with a marked decrease in the nearest Ni-O bond length. It appears that the suggestion that Ni²⁺ ions are present in fivefold as well as fourfold coordination gives a satisfactory explanation for the present data.

Original language	English
Pages (from-to)	151-155
Number of pages	5
Journal	Physics and Chemistry of Glasses
Volume	31
Issue number	4
Publication status	Published - Aug 1 1990

ASJC Scopus subject areas

Ceramics and Composites
Physical and Theoretical Chemistry

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abstract = "A study of the extended x-ray absorption fine structure of sodium borate glasses containing 1 mol% NiO gave a Ni-O bond length of 1.99-2.04 A depending upon the composition of the glass. It indicated that the coordination number of the Ni2+ ion begins to change at 15-20 mol% Na2O, with a marked decrease in the nearest Ni-O bond length. It appears that the suggestion that Ni2+ ions are present in fivefold as well as fourfold coordination gives a satisfactory explanation for the present data.",

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AU - Maekawa, T.

AU - Kawamura, K.

AU - Yokokawa, T.

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N2 - A study of the extended x-ray absorption fine structure of sodium borate glasses containing 1 mol% NiO gave a Ni-O bond length of 1.99-2.04 A depending upon the composition of the glass. It indicated that the coordination number of the Ni2+ ion begins to change at 15-20 mol% Na2O, with a marked decrease in the nearest Ni-O bond length. It appears that the suggestion that Ni2+ ions are present in fivefold as well as fourfold coordination gives a satisfactory explanation for the present data.

AB - A study of the extended x-ray absorption fine structure of sodium borate glasses containing 1 mol% NiO gave a Ni-O bond length of 1.99-2.04 A depending upon the composition of the glass. It indicated that the coordination number of the Ni2+ ion begins to change at 15-20 mol% Na2O, with a marked decrease in the nearest Ni-O bond length. It appears that the suggestion that Ni2+ ions are present in fivefold as well as fourfold coordination gives a satisfactory explanation for the present data.

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