Ni²⁺置換フッ素四ケイ素雲母の合成と性質

• 北島 圀夫

  信州大学工学部物質工学科

• 井原 義博

  信州大学工学部物質工学科

• 田草川 信雄

  信州大学工学部物質工学科

書誌事項

タイトル別名

• Synthesis and Properties of Ni²⁺-Substituted Tetrasilicic Fluorine Micas
• Ni2 + チカン フッソ 4 ケイソ ウンモ ノ ゴウセイ ト セイシツ

抄録

Various Ni²⁺-substituted tetrasilicic micas having high contents of Ni²⁺, such as KNiMgLi(Si₄O₁₀)F₂, KNi₂Li(Si₄O₁₀)F₂ and KNi_2.5(Si₄O₁₀)F₂, were synthesized at ca. 900°C through solid-state reaction techniques. Lattice constants a, b, c decreased with increasing Ni²⁺-substitutions, reflecting the decrease in the ionic radius of Ni²⁺ against Mg²⁺. UV-visible spectra of Ni²⁺-micas were very similar to those of [Ni(H₂O)₆]²⁺, This can be explained in terms of the nephelauxetic series F^-<H₂O<O_a (apical oxygen) as well as the spectrochemical series F^-<H₂O<O_a. IR spectra showed that the tetrahedral distortion changes with increasing Ni²⁺-substitutions, i.e., the interatomic distance of Si-O_a lengthens while that of Si-O_b (basal oxygen) shortens. Ni²⁺-micas exhibited paramagnetism when the Ni²⁺ content was smaller than 2.0 mol in octahedral sites, however, antiferromagnetism seemed to appear at larger substitutions of 2.5 mol Ni²⁺ per formula unit.

収録刊行物

• Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌)

  Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌) 103 (1202), 1057-1062, 1995

  公益社団法人 日本セラミックス協会

キーワード

• Fluorine mica
• Ni²⁺-substitution
• Lattice constant
• IR-spectra
• UV-visible spectra
• Magnetic susceptibility

詳細情報

• CRID: 1390282680253860608
• NII論文ID: 110002291810
• NII書誌ID: AN10040326
• DOI: 10.2109/jcersj.103.1057
• ISSN: 18821022
• ISSN: 09145400
• NDL書誌ID: 3636750
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3636750
• Web Site: http://www.jstage.jst.go.jp/article/jcersj1988/103/1202/103_1202_1057/_pdf
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